Simultaneously running 2 versions of Photoshop Elements

[#1]

If I upgrade from Photoshope Elements 12 to Elements 20, will the older Elements 12 still remain on my computer or will it be automatically overwritten?  I would like to keep it until I have fully transitioned to Elements 20.

[#2 · Accepted solution]

Installing Photoshop Elements 2020 will have zero effect on your Photoshop Elements 12 app.  Both instances will be available to open and to use at your discretion.  The term upgrade does suggest otherwise (an overwrite) so you were wise to inquire first.  By the way if you haven't made your purchase yet, 2020 is on sale for $69.99 at Adobe right now.