i wanted to play a mod but it broke on 1.12You will need to overwrite the latest version with the AoD 1.08 patch. However doing so, might make the game unstable since the 1.08 patch can't over scripts, files events, etc. that didn't exist when 1.08 was release. I would recommend you make a copy of your steam version and apply the 1.08 patch against it. Then test it.
What's the reason you want to downgrade to 1.08? 1.13 release is currently being worked on.
If the mod works on 1.11 (or any previous version), you will need to install that version or an earlier version and apply the patches up to the version that the mod works with.i wanted to play a mod but it broke on 1.12