I am using v3.0.2.
Let's say you have a file named A.exe and in the same folder a signature file named A.exe.asc.
If you right click on A.exe and do More GpgEX options -> Verify you get an error dialog reading:
Error returned by the GnuPG user interface (Kleopatra):
If you do the same on A.exe.asc, verification works fine.
v2.3.3 verifies correctly the file even if you right click on A.exe instead of the signature file.
This is a regression.