Like many other posters I cannot activate Draftsight. In my case the activation dialog appears, I fill in all the details, but the "activation" button remains greyed out and I cannot click it.

I'm using KDE-neon (fresh install, which is why I need to reinstall Draftsight) which is a Debian/Ubuntu based distro. I have previously used Draftsight on Mint 18.3 with no problem.

:-( Ian