[Need to switch to an earlier version of Aff.Designer]

Thanks Walt.Farrell, I'll try that.

[Need to switch to an earlier version of Aff.Designer]

Since the last mac update, and Affinity Designer's 1.8 update (don't know which is causing what, to be honest),  the software crashes when opening anything. Plus, the screen blanks and flashes with my desktop image distorting in all sorts of ways... very disturbing to say the least.  I LOooooove Aff.Designer and really need it to work from home in these troubled Covid-19 times!!  So I'm desperately searching for an earlier version to download, I the hopes it will not bug as this one does. Maybe my computer is too old for the new 1.8 version? 

THANK YOU in advance to all who can help!

Macbook Pro from 2012