I have two laptops which access my Wappler data on a shared networked device.
I am thinking of leaving 3.9.7 on one laptop and installing 4.0 on the other.
If I switch between laptops to edit my app, will making changes with 4.0 create problems when I then try to make edits with 3.9.7?
You should have no problems between 3.9.7 and 4.0.1 as the changes were primarily cosmetic in the UI.
That may not be the case in going forward into version 4 though. At this point I really see no reason to keep 3.9.7.
Yes you can run 3.9.7 and 4.0.1, i don’t see a reason why you can’t do this.