SDL MultiTerm 2014 SP2 does not open

After upgrading from SDL MultiTerm 2014 to SP2, the application does not open at all, and I get the following error message:

Could not find any resources appropriate for the specified culture (or the neutral culture) on disk.
baseName: Sdl.MultiTerm.Studio.Catalogue.plugin locationInfo: <null> fileName: Sdl.MultiTerm.Studio.Catalogue.plugin.resources

Can someone tell how to fix this?