I downloaded this from WinMerge.org which redirected me to SourceForge.
I tried to open q.bat from an earlier 2.16.x version with notepad but ESET deleted this file as well.
The q.bat was located in C:\Program Files\WinMerge\Commands\q\q.bat and created a process which was blocked in C:\Users\MyUser\AppData\Local\Temp\is-GQAAA.tmp\WinMerge-2.16.50.2-x64-Setup.tmp
I unfortunately can't check or post any virus reports because my system is currently being wiped and restored from backup image.
Should I be worried?