It is the free short version
Viewing post in Welcome Back, Commander comments
For itchio you can download it for free, donations are optional, I don't know how I can refund if you accidentally clicked on it but I did not get any notifications so I assume you fixed it.
I'm glad you are enjoying the game, I think we can push a few more updates, right now we are working on polishing the balance, final adjustments.
Also Thank you for your support!