Hey @SkyRider. Not too sure of your predicament, but, if you still have the "offline installer" on your usb, then re-run it. You should get an option to Repair/Uninstall, choose the uninstall. (If there is no uninstall option then you may have to run the msi from a command line with the -u switch.)
Not sure of your tech level, I am assuming you went to Add/Remove programs first, to uninstall Chrome. Now, this is how I understand it. The offline installer is the same version as you would get if you were to install the online version, only you don't download during the install. You may have to Google for an older version of Chrome. Is there a specific version of Chrome you are looking for? (It's just a browser, the latest version is usually the best, unless we are talking IE, then all bets are off.)
I am interested to hear how you get around it. A system restore will work, but pretty drastic in my opinion (as my files are in a constant flux), but maybe not such an extreme measure to yourself.