You was right about the issue. However, I reinstalled and no problems already second day. I get it to work without generation of new key (that’s fine). Thanks.
One more think. As you actually upgraded features and your movie is not working for setup procedure vs custom codes, I would like to be clear what is exact procedure when new plugin should to be installed. Only to put Auto Restore Off and then On or something else (I guess that procedure is same also when some other changes is done on server via FTP)?