It would be helpful to have two instances open side by side for comparison.
If I open a second instance and open a hmi file I get the error:
"The process cannot access the file 'C:\Users\User\AppData\Roaming\Nextion Editor\ca.ca' because it is being used by another process."
I am now reviewing all of the Feature Requests, this will take some time, patience please.
With future versions, I can have multiple Nextion Editors 2 v0.38 and a v0.40 operational at the same time.
I believe only one can be running in the debug simulator mode at a time.
This is not a feature request to be included.