Hack Support

had a notification pop up to install net.framework 3.0, after the install the launcher was showing a bunch of missing files. I fixed that by redownloading and replacing the files. now its showing another missing file but I've redownloaded donut mod like 3 times.

Try the install verifier and see if your game has all the required files. If you have a crack, it's most likely it doesn't have some of the files & I recommend getting a legitimate copy of the game.
Is it just DM3 that does this or is everything else doing the same? Keep in mind that DM3 is a relatively old mod & has a bunch of bugs/crashes you might encounter.

I actually fixed it earlier today, just did a fresh install and everything worked again. Cheers