It is false positive. The install file has been checked with many antivius tools and most of them do not detect any problem. You can see the report in below link (even Microsoft Defender has no problem with it)
https://www.virustotal.com/gui/file/330232770292eb4b316726c2636fdde08ee3b83c891b...
Sometimes some antivirus software detects problem with unpopular application (which were not installed on thouseds of PCc). As they based on heuristic (simply saying guessing) they often makes false reports. By default windows suspect not popular program which are not digitally signed as this appp. Unfortunately signing which makes application safe from OS point of view is possible only for companies (as Movie Business is hobby project even if I would paid for certificate it will not be granted for private person).
From my side I can only says that few thousands of persons already installed latest version and they didn't get any problems.
But of course I totally understand that you may be scared with this install. If you have any doubts do not install it.
UPDATE: I reported it to Microsoft to check once again new version by them.