DraftSight free keep asking for registration on startup despite the fact it was registered

Hello,

I have ran on the same problem now with new 2017 free DraftSight installation that I had in the past but I do not remember how it was solved.

I registered, got the email confirmation, clicked on link to finish registration.

DS opens once but after I close and want to open again it asks for registration again.

Very annoying, please help!

Andrzej