If you're having problems updating, it is most likely a problem with permissions, you can check the security on the folder, or just download the latest version straight from the download page.
Yeah, this happens with me. It usually gets to 90-98% then it gets an error. After about 5 times of trying, it usually works. It's probably an un-fixable bug, so downloading off the site is fine.
I downloaded a powder toy I think it was the 41.3 and it said something about me not having a program with a very forgetful name and downloading it again would help or something. I downloaded it again and it was fine
Same.But mine finishes and closes and i open again says Finalizing Update and dissapears in 1 second.(maybe 0.9,i have good eyes =P)And when i try again to open the it works normally but not updated.