I cannot disable (turn off) G-code generator window on starting up.

It's about Draftsight 2020 beta for Mac. Thisg-code window is not useful for me so I wanted to turn it off by deselecting it in the option but as soon as I click the tick the programme just crashes (not the beachball of death) so I need to close this window every time I start the programme. Also noticed that 2020 is way more sluggish and full of bugs than Draftsight 2019. 

Also copy /drag causes the programme to stop working often and I need to force quit and restart. Alas Draftsight is no longer free but I don't think it's a very good trial version to encourage me to switch to the paid version, yet I got only 28 more days to go