Freeze Error

Hello,

Currently, I am using the Draftsight 2019 version on my computer, and as soon as I start to modify a drawing, or start drawing something, it freezes up and I cannot use it. the mouse disappears from the black screen and I have to shut down the program. I have a basic subscription for 1 year also. so the question I have is, if I uninstall Draftsights 2019 and download it again, firstly it looks like I can only download the 2020 version, and secondly if I download the 2020 version, can I use the same activation code that I used for the 2019 version.