text capture Lingoes does not work anymore

A few months ago I started using Lingoes instead of Babylon as dictionary software.
This has worked very fine for me.

However since today the text capture (ctrl + right mouse click) does not work anymore.
I am using Windows Vista.

Any suggestions what could be the problem here?

At first I “solved” the problem by means of a Windows Vista system restore.

That did the trick for a few days. But now the problem is back.

Any suggestions?