Download file invalid ; md5s do not match server

I am having the same problem.

Downloaded Impulse fine, and Impulse downloaded Demigod version 1.0 (2.82gb) but I get the MD5 error on the Demigod update (1.88gb)

would love an answer for this as well, same problem.

Were you by chance in the Beta?  If so, you may need to uninstall and reinstall the game.  If you continue to have this issue, then get to us at support@stardock.com and we'll try to fix you up.

I have tried to download and install this thing now 10 times, with same result. very annoyed... I can't even install somthing I paied for.. I mean come on guys,really. and no I never ever had impluse or the beta before ever before this

If something is interfering with or corrupting the impulse download, give Impulse Anywhere (http downloads) a shot.

I had the same problem, saw somewhere else in another stardock game forum that theres like malware ruining the download. So what i did was download spybot search and destroy(free) and i let it scan and it found stuff. After it was done i started to redownload the update and it worked! Try that, should work.