How to revert to previous AOE2 version in steam

How can I revert to the previous AOE2 version in steam?

I also got some issues after updating the hotfix today.
Is it possible just to revert the installation of the latest hotfix 39515?

Not possible without some key from the devs. They only seems to share those keys for big tournament.

Yesterday there was a hotfix. I havent tried the game, but i think your issues might be solved.

Found this one. Use it with care. I dont know if it works. Might be the solution.

Thry released a hot fix already guys