Today Draftsight suddenly started to freeze every time I open a drawing.

It works OK until I open a file, then the mouse pointer changes to hourglass, and after a while "Draftsight doesn't answer". No other messages, nothing in the command window.

After removal and reinstall I could open a file once, but then it stopped working again.

Windows 10 64-bit (installed a week ago), Draftsight 2020 Sp1, 16 GB Ram.

What can I do to resolve this?