False Positive (?) for Trojan.Script/Wacatac.B!ml

I have a Visual Basic (classic Not Net) complied program, I've run for over 20 years without a problem. If I run the program in the IDE, everything is fine. However, if the complied program is run, Windows Defender Virus (now with the latest upgrade) is saying it contains Trojan.Script/Wacatac.B!ml, and erases the EXE (complied) file. I've designated the EXE file as "Pin to StartUp" as it resides on a non-OS Win-10 partition (Drive D), and then executed Malwarebytes. Malwarebytes comes back clean. However Windows Defender Virus with a custom scan of the EXE in the non-OS drive, or if referenced as "Pin to StartUp", always thinks it is a virus and erases it.

QUESTIONS
I assume I am getting a false positive.
1) Any suggestions to really confirm?
2) How do I get Windows Defender Virus to ignore the EXE so I can use it?
3) Is there anyway to get Malwarebytes to can just a file?

Thanks
David

Callender THanks for responding.

Have you ever used/ installed Aura's Anti-Virus?

: NO

Thanks for the info. Will check out for excluding once I double confirm system is clean.

FWIW, the last one is a Shell Extension someone wrote that updates Explorer menus with this option.

Thanks for additional links.
Microsoft Community link was helpful as at least someone else had a problem.
FWIW: Rather than going with another virus checker, sent the file to M$ to check.
Will see if I get a response.
FWIW: Had already deleted history, and still coming up virus so didn't help this case.

Regards,
David