The most important info I was looking for was the bootloader version 101 and your system versoin(s) 207 which seem to be OK.
I'd not recommend resetting your device back to 0.4.1, but since inspect didn't revealy any issue, I guess it's fine.
However, I'd just repeat my suggestion from the other thread
and even if your other devices have no issue connecting to the same network, just try it anyway. And to be sure, I'd also recommend to wipe any stored credentials from the device by holding the SETUP button for 10+ seconds till the RGB LED starts flashing blue rapidly and then apply only the credentials of the new (non-WEP) WiFi network.