Avast suddenly blocking Pandora desktop app

I’ve been using both Avast and the Pandora desktop app (the Pandora that plays music, that is) just fine for several months now. But today when I went to open up the app, Avast blocked it from opening. The message that pops up reads:

Avast File System Shield has blocked a threat. No further action is required.
Object: C:\Users.…\Pandora.exe
Infection: Win32:Evo-gen [susp]
Action: Moved to chest
Process: C:\Windows\System32\msiexec.exe
The threat was detected and blocked just before the file was opened.

The popup gives me an option to report it as a false positive and/or add the file to the scan exclusion list, but doing so still doesn’t allow me to open the program; every time I do, Avast just blocks it again. I tried manually adding it to the exclusion list in the options menu, same deal. The only way I can actually open the program is by disabling Avast and re-enabling it.

I’ve been using this for months without any problems, so I know it’s safe. Is there something else I can do to allow it to run aside from temporarily shutting down Avast every time I want to listen to music?

You can report a suspected FP here: https://www.avast.com/false-positive-file-form.php