Hi Everyone ! New here myself and wanted to start by saying thanks for all your great input on the E4 it is very much appreciated
For anyone trying to downgrade from 2.11 (I assume this applies to 2.8 also) and are having the the issue where "flir tools upgrade window" appears and not the e4 firmware upgrade window, the following worked for me. I installed 4.1.14xxxxxxx which is the xp version still available on the flir website. I used windows 7 home premium 32 bit edition. Follow this path:
Start/all programs/FLIR Systems/"right click" on FLIR tools/properties/Compatibility tab/check "Run this program in compatibility mode for:" choose "Windows xp (Service Pack)" also check "Run this program as administrator". Click "Apply and then Click "Ok"
Next follow MATMOE's instructions and everything should work. It worked for me, I successfully downgraded 2.11 to 2.3 e4 1.2L s/n 6397xxxx
This may work for other versions of windows. I did test on Windows 10 pro 64 bit I got the menu to appear but never tested the firmware downgrade because I am too afraid lol best to leave well enough alone haha.
Using windows 10 follow path: windows symbol(start menu)/All Apps/Flir Systems folder/right click on "Flir Tools icon"/"more"/"open file location"/right click on "Flir Tools icon"/Compatibility tab/ check "Run this program in compatibility mode for:" choose "Windows xp (Service Pack)" also check "Run this program as administrator". Click "Apply and then Click "Ok"
I can't speak to whether the firmware downgrade will work on other versions of windows other than win 7 home prem 32 bit but the above should get you to the point where you can actually attempt it.
I would also like to add that my camera does the same amount of calibrating before the downgrade as it does after, nothing seems to have been affected by the the downgrade as far as I can tell.
Regards,