I caught the above typo in an email from one of our software vendors at work. I thought about it for a second and concluded this could be a new sniglet-esque word, similar to ‘road rage’. ‘Upgrage’ could be the anger you feel after upgrading (or having an upgrade slammed on your system by helpful automated tools) which renders the application/system even more borked than it was prior to the upgrade.
Interestingly, this typo appears quite a bit on Google but I have not found anyone who has actually assigned it this meaning. History being made, right here on this post 🙂