I tried the transparency... and it worked in Affinity Photo (and I am sure for other painting apps too)
But, it didn't work in iFranView Image viewer. And I know that supports alpha images.
But anyway... I am aware that transparency is not supported in every application.
But, I think I am done with this thread.
BTW.... Every time I click the X (close) button to exit out of the application I get an error. See below screenshot
this is just opening LazPaint and doing nothing, and then exiting the program.
Thought you may want to know.