...
I didn't go to the extent of downloading and running a scan with bitdefender, but nice follow up that Maslov has.
I have checked Recorder v3, and Studio v3 latest updates with my 2 Virus and Malware scanners to no result, so I feel it is free of anything malicious, I wasn't sure what version the OP was referring to, I just took it as was referring to the latest version of v3.
I have had it happen before on other programs I trusted weren't infected, usually only one file gets scooped up, but it's one that the program needs to function properly.
You can report it to bitdender as a misdetection also, or as an issue with a recent update, as you stated you did do that with your AV program, thanks for the link to it for them.
You could also do an uninstall/reinstall of bitdefender and of iPi Recorder, if you wanted, maybe one or the other got corrupted on update, if using Win 10 that wouldn't surprise me, then delete all you can from inside of the temp folder after install completes, some files you may not be able delete from Temp, just skip them when prompted.
(Path:
C://Users/User/App Data/Local/Temp), or simply type %temp% in the windows search box and select it from the lists top result, be sure to have show hidden files and folders turned on first in Folder Options/View.
This should be done frequently anyway if the user downloads a lot of free programs... viruses, malware and adware hide there to run on startup.
...