VST Sound Library not found

Weird problem after no apparant change to system

yesterday all was fine, today I get
VST Sound Library “” not found:
C:\program Files\Steinberg\Cubase LE AI Elements 8\VST Sound\FCP_SMT_Cubase.vstsound

Locate Ignore remove

choosing locate gives the folder mentioend, where the file actually is. But somehow Cubase won’t accept it.

Any quick fix? Help welcome, have some deadlines tonight.

Have updated elicenser, but that did not help.
help much appreciated