My solution to the CRPG update problem.

[Belhade]

Fack! I don't have previous versions! I did have a Windows restore point from 4/17, which I figure was before the Steam patch...but that didn't work.
Waiting on a patch then, I guess.

[Slinky]

Just letting everyone know that you only need the 1.143 exe to run it properly again.

Just find your old mb_warband.exe and replace the 1.150 one and ta-daa!

[kinngrimm]

1. I made sure to turn off the automatic updates in the properties of the game on steam.
2. I went to program files, clicked on steam, steamapps, and then common.
3. I right clicked on mount and blade warband and went to the properties.
4. I clicked on the previous versions tab and selected an option prior to the update.
5. I moved that version to my desktop, deleted the previous one and replaced it with the older version by dropping it in the common folder.

I don't know how far back your previous version is, but this worked for me.

worked like a charm, only instead of deleting the old one i renamed it to include the talesworld patch number if then cRPG would be using that later on