@m_m thanks for reaching out to me! See below the results, I hope this is more helpful to you than it is to me
From VSCode’s main menu, select “Help” > “Toggle Developer Tools” then when that panel appears, switch over to the “console” tab, try to launch the “Welcome” screen, and look for any interesting errors.
This is what I get:
Activating extension 'ms-vscode.cpptools' failed: Cannot find module '/Users/Tim/.vscode/extensions/ms-vscode.cpptools-0.29.0/dist/main'
Require stack:
- /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/loader.js
- /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-amd.js
- /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-fork.js.
_logMessageInConsole @ /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4279
/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4279
Cannot activate extension 'Workbench Core' because it depends on extension 'ms-vscode.cpptools', which failed to activate.
_logMessageInConsole @ /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4279
/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4279
Cannot activate extension 'Arduino' because it depends on extension 'ms-vscode.cpptools', which failed to activate.
_logMessageInConsole @ /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:4279
/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/workbench.desktop.main.js:1670 ERR No application in the Launch Services database matches the input criteria.: Error: No application in the Launch Services database matches the input criteria.
From VSCode’s main menu, select “View” > “Output”, then try to launch the “Welcome” screen, and then cycle through the various logs (look for the drop-down menu in the panel toolbar top-right) and look for any interesting errors.
The log "Extension Host" looked interesting to me, see below:
[2020-07-20 19:29:54.508] [exthost] [info] extension host started
[2020-07-20 19:29:54.528] [exthost] [info] ExtensionService#_doActivateExtension vscode.debug-auto-launch {"startup":true,"extensionId":{"value":"vscode.debug-auto-launch","_lower":"vscode.debug-auto-launch"},"activationEvent":"*"}
[2020-07-20 19:29:54.528] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/debug-auto-launch/dist/extension
[2020-07-20 19:29:54.534] [exthost] [info] ExtensionService#_doActivateExtension vscode.emmet {"startup":true,"extensionId":{"value":"vscode.emmet","_lower":"vscode.emmet"},"activationEvent":"*"}
[2020-07-20 19:29:54.534] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/emmet/dist/extension
[2020-07-20 19:29:54.547] [exthost] [info] ExtensionService#_doActivateExtension vscode.git {"startup":true,"extensionId":{"value":"vscode.github","_lower":"vscode.github"},"activationEvent":"*"}
[2020-07-20 19:29:54.547] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/git/dist/main
[2020-07-20 19:29:54.587] [exthost] [info] ExtensionService#_doActivateExtension vscode.github-authentication {"startup":true,"extensionId":{"value":"vscode.github-authentication","_lower":"vscode.github-authentication"},"activationEvent":"*"}
[2020-07-20 19:29:54.588] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/github-authentication/dist/extension.js
[2020-07-20 19:29:54.604] [exthost] [info] ExtensionService#_doActivateExtension vscode.merge-conflict {"startup":true,"extensionId":{"value":"vscode.merge-conflict","_lower":"vscode.merge-conflict"},"activationEvent":"*"}
[2020-07-20 19:29:54.604] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/merge-conflict/dist/mergeConflictMain
[2020-07-20 19:29:54.608] [exthost] [info] ExtensionService#_doActivateExtension vscode.microsoft-authentication {"startup":true,"extensionId":{"value":"vscode.microsoft-authentication","_lower":"vscode.microsoft-authentication"},"activationEvent":"*"}
[2020-07-20 19:29:54.608] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/microsoft-authentication/dist/extension.js
[2020-07-20 19:29:54.614] [exthost] [info] ExtensionService#_doActivateExtension vscode.search-result {"startup":true,"extensionId":{"value":"vscode.search-result","_lower":"vscode.search-result"},"activationEvent":"*"}
[2020-07-20 19:29:54.614] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/search-result/dist/extension.js
[2020-07-20 19:29:54.616] [exthost] [info] ExtensionService#_doActivateExtension ms-vscode.atom-keybindings {"startup":true,"extensionId":{"value":"ms-vscode.atom-keybindings","_lower":"ms-vscode.atom-keybindings"},"activationEvent":"*"}
[2020-07-20 19:29:54.616] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/.vscode/extensions/ms-vscode.atom-keybindings-3.0.8/extension
[2020-07-20 19:29:54.618] [exthost] [info] ExtensionService#_doActivateExtension ms-vscode.cpptools {"startup":true,"extensionId":{"value":"vsciot-vscode.vscode-arduino","_lower":"vsciot-vscode.vscode-arduino"},"activationEvent":"*"}
[2020-07-20 19:29:54.618] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/.vscode/extensions/ms-vscode.cpptools-0.29.0/dist/main
[2020-07-20 19:29:54.620] [exthost] [info] ExtensionService#_doActivateExtension marus25.cortex-debug {"startup":true,"extensionId":{"value":"particle.particle-vscode-core","_lower":"particle.particle-vscode-core"},"activationEvent":"*"}
[2020-07-20 19:29:54.620] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/.vscode/extensions/marus25.cortex-debug-0.3.7/dist/extension
[2020-07-20 19:29:54.655] [exthost] [error] Activating extension ms-vscode.cpptools failed due to an error:
[2020-07-20 19:29:54.657] [exthost] [error] Error: Cannot find module '/Users/Tim/.vscode/extensions/ms-vscode.cpptools-0.29.0/dist/main'
Require stack:
- /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/loader.js
- /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-amd.js
- /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/bootstrap-fork.js
at Function.Module._resolveFilename (internal/modules/cjs/loader.js:762:15)
at Module._load (internal/modules/cjs/loader.js:667:27)
at Module._load (electron/js2c/asar.js:717:26)
at Function.Module._load (electron/js2c/asar.js:717:26)
at Function.t._load (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:974:348)
at Function.i._load (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:943:839)
at Function.n._load (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:940:198)
at Module.require (internal/modules/cjs/loader.js:820:19)
at require (internal/modules/cjs/helpers.js:68:18)
at Function.s [as __$__nodeRequire] (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/loader.js:33:205)
at h._loadCommonJSModule (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:945:34)
at h._doActivateExtension (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:835:599)
at h._activateExtension (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:834:692)
at Object.actualActivateExtension (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:832:453)
at h._activateExtension (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:601:405)
at /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:601:83
at Array.map (<anonymous>)
at h._activateExtensions (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:601:71)
at h._activateExtensions (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:601:140)
at h.activateByEvent (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:598:546)
at h._activateByEvent (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:833:300)
at h._handleEagerExtensions (/Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:838:218)
at /Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/out/vs/workbench/services/extensions/node/extensionHostProcess.js:841:872
at processTicksAndRejections (internal/process/task_queues.js:85:5)
[2020-07-20 19:29:54.826] [exthost] [info] ExtensionService#_doActivateExtension vscode.github {"startup":true,"extensionId":{"value":"vscode.github","_lower":"vscode.github"},"activationEvent":"*"}
[2020-07-20 19:29:54.827] [exthost] [info] ExtensionService#loadCommonJSModule file:///Users/Tim/Applications/Visual Studio Code.app/Contents/Resources/app/extensions/github/dist/extension.js
[2020-07-20 19:29:54.848] [exthost] [info] eager extensions activated
MacBook-Pro:~ Tim$ ls -la ~/.vscode/extensions/
total 0
drwxr-xr-x 14 Tim staff 448 20 Jul 16:21 .
drwxr-xr-x 4 Tim staff 128 24 Nov 2019 ..
drwxr-xr-x 8 Tim staff 256 31 Okt 2018 codealb.codealb-0.0.1
drwxr-xr-x 9 Tim staff 288 11 Mär 2019 felixfbecker.php-debug-1.13.0
drwxr-xr-x 15 Tim staff 480 16 Jul 17:32 marus25.cortex-debug-0.3.7
drwxr-xr-x 35 Tim staff 1120 17 Jul 23:40 ms-python.python-2020.7.94776
drwxr-xr-x 16 Tim staff 512 6 Mai 13:05 ms-vscode.atom-keybindings-3.0.8
drwxr-xr-x 28 Tim staff 896 16 Jul 17:31 ms-vscode.cpptools-0.29.0
drwxr-xr-x 7 Tim staff 224 20 Jul 16:21 particle.particle-vscode-core-1.12.1
drwxr-xr-x 7 Tim staff 224 20 Jul 16:21 particle.particle-vscode-pack-1.12.1
drwxr-xr-x 7 Tim staff 224 20 Jul 16:21 particle.particle-vscode-snippets-1.12.1
drwxr-xr-x 7 Tim staff 224 20 Jul 16:21 particle.particle-vscode-theme-1.12.1
drwxr-xr-x 12 Tim staff 384 17 Jul 23:40 tobiasalthoff.atom-material-theme-1.10.3
drwxr-xr-x 14 Tim staff 448 16 Jul 17:31 vsciot-vscode.vscode-arduino-0.3.1
MacBook-Pro:~ Tim$ ls -la ~/.particle/
total 1544
drwxr-xr-x 13 Tim staff 416 16 Jul 17:32 .
drwxr-xr-x@ 76 Tim staff 2432 12 Apr 23:44 ..
drwxr-xr-x 436 Tim staff 13952 16 Jul 17:32 .npm-cache
-rw-r--r-- 1 Tim staff 52 16 Jul 17:31 autoupdate
-rw-r--r-- 1 Tim staff 120889 16 Jul 17:32 error.log
drwxr-xr-x 9 Tim staff 288 31 Mär 19:09 node-v12.16.1-darwin-x64
drwxr-xr-x 440 Tim staff 14080 16 Jul 17:32 node_modules
-rw-r--r-- 1 Tim staff 636427 16 Jul 17:32 package-lock.json
-rw-r--r-- 1 Tim staff 276 20 Jul 16:18 particle.config.json
-rw-r--r-- 1 Tim staff 59 16 Jul 17:32 plugin-cache.json
-rw-r--r-- 1 Tim staff 41 20 Jul 16:17 profile.json
drwxr-xr-x 2 Tim staff 64 31 Mär 19:09 tmp
drwxr-xr-x 7 Tim staff 224 11 Mär 2019 toolchains
MacBook-Pro:~ Tim$ ls -la ~/.particle/toolchains
total 0
drwxr-xr-x 7 Tim staff 224 11 Mär 2019 .
drwxr-xr-x 13 Tim staff 416 16 Jul 17:32 ..
drwxr-xr-x 10 Tim staff 320 29 Mär 17:21 buildscripts
drwxr-xr-x 7 Tim staff 224 3 Nov 2019 buildtools
drwxr-xr-x 14 Tim staff 448 1 Apr 13:02 deviceOS
drwxr-xr-x 4 Tim staff 128 3 Jan 2019 gcc-arm
drwxr-xr-x 5 Tim staff 160 3 Nov 2019 openocd