Please look in sever SECTION and you would have found this.
Posted by tbvp
I had the same problem, thanks to suggestions posted here, that problem is now solved. In recap:
1) trepor.cal3d can be fixed by going to the models.zip in the art folder and deleting it causing the updater to redownload the entire thing. This is unwise to do for people with dial-up as it\'s 21 MB file and will take awhile. A better option for all users is to find that file in the zip fie, remove it from the zip and resave the zip. That way less bandwidth is used when the updater fetches the file again.
2) libmng-cs.dll is fixed by running the updater in recovery mode.
3) updater.exe is fixed by changing the name of the updater.exe to something else like oldupdater.exe, running that, and then deleting the renamed updater.exe after it\'s finished downloading a new copy. I guess it can\'t update itself while running, hence, it failing to update every time.