Installation of Atlas did not work ... Wrong PS version?

Envato Customers Purchases and Subscriptions
1

Hi …
Hope this is the right group. I can’t seem to be able to locate any email address or other ways of communicating with the customer support.
So I think I’ll just leave a post here in this forum, and hope for the best.

I just purchased and downloaded Atlas plugin for Photoshop, but nothing shows up in the Window/Extensions menu. Not even after several restarts ans reinstallations.
I have a rather old version of PS, namely PS5.5 from the CS5 package.
Could it be that I should downloaded an earlier version of Atlas? I can’t find any, though.
Is there another solution to this?

Regards
Tresfjording

2

Assuming this is the item? https://graphicriver.net/item/3d-map-generator-atlas-from-heightmap-to-real-3d-map/22277498

It says the minimum version is 2015, so check the item documentation which will explain installation, and if no solution then reach out to the author https://graphicriver.net/item/3d-map-generator-atlas-from-heightmap-to-real-3d-map/22277498/support or https://www.3d-map-generator.com/support/