Hello Davka, I have same issue, apparently is a bug in the software, first time was solved updating the version, now this problem is happen again and I have downloaded the latest version. I do not know what to do :( if anyone finds the solution let me know.
BW: I have installed this last version in multiple laptos and Desktops, so I am sure the issue is in the software itself.
Gx Works 3 Version 1.027D.