There seem to be lots of weird errors and problems going on now with the latest patch. What I've seen personally:

- Online multiplayer is completely non-functional. The option to select it in the menu is just grayed out.

- All weapons do only one damage, from the prod to the holy hand grenade. I gave up doing a community mission when I realized it was going to take me over an hour to just kill one worm.

No, the patch is fine and functional. Seems like Steam didn't download the patch properly for you. To fix this, go to your Steam library, right mouse click on Worms, then select "Properties" and "Verify game caches".

Okay. I went ahead and reinstalled the game and it seems to be working fine now, thanks for the tip.

Oh, okay then... that's another solution, but you really don't have to reinstall it. As I described, there's a way to let Steam check which files are corrupted ;)