ReefMaster2 do not start. Fault in line 8 un user.conf
<startup useLegacyV2RuntimeActivationPolicy="true">

Unhandled exception

It started yesterday but not today.

I have reinstalled the program but the same results.

Locate the file user.config in the following directory. Note that some folders in the path may be hidden by default under explorer:

C:\Users\[your username]\AppData\Local\ReefMaster_Software\ReefMaster.exe_Url_xxx\2.1.52.0\user.config

Delete this file, if it exists, and try to start ReefMaster again. Please let me know if the problem persists.

I renamed the file. It works now*! It will only use DirectX. No big deal.