Game checksum is different from the launcher's

[Peanut Butter]

Recently when I went to play multiplayer with a couple friends, it wouldn't let me join saying, "The host has a different version of the game." My checksum on vanilla reads "6097" and on r56 reads "52f3", both of which are different from my friends'.

I've cleared my cache, deleted backups, and redownloaded the game but still have no success. We've tried disabling all dlc and mods but neither does that work. Does anyone know of any ways to try and fix the issue?

[bubbas]

The in-game checksum is the only one you should care about! Do not pay attention to the one in the launcher, as this is not your final checksum.

The current live version is 1.10.8 with the checksum 0aab

Keep in mind that most mods will change the checksum. So make sure that you are using the same mods and only the same mods when trying to play multiplayer together.

Note that DLC's have no impact on checksums.

If you have made any edits to any game files then delete those files manually. This because those files won't be removed when uninstalling nor replaced if verifying.

If you are experiencing issues with your checksum (when going for achievements or trying to play multiplayer) you can first try the 'Clear user directory' button on the launcher and see if that helps.

If not then you will need to do a clean re-install. A clean re-install will fix all checksum issues but is a little more hassle:
http://steamcommunity.com/app/394360/discussions/2/1471966894885959849/
Follow the instructions that start with: Procedure to solve point 1º

The important part of the clean re-install is the order of which things are done. Also do not miss the last part about starting the game up and loading in to the main menu once before activating any mods after doing the clean re-install.

[Peanut Butter]

Thank you. That fixed the issue.