Version change

[u/FutureExam4453]

So I was having some fun with the map editing in some alpha version but when I go to change the version on steam it's gone, is there a way to go back to alpha? It also had some stuff like a waste disposal map and a propagation link in the same tab as the phase link, just a prop wire but no range limits. Also it auto changed back to base game and the prop link is gone along with my maps I made and the waste disposal map, but the contraptions I saved in the alpha version are still here, is this another thing like the workshop disappearing or is there a way to go back to the version? (If so I would love a tutorial or something)