Age of Empires III strange error message
When I try to open the game I get: "The path (HD name) , contains a slash (/), backslash, or a period" All versions on HD get this message. Just played the game last week with no problems. Even reloading the game gives me this error message when I try to open the game. Cannot get past this point. It states below the error message that I must "remove the character from the appropriate Folder's name and try again. " What folder? I haven't done anything to the computer. I am mystified. This is Mountain Lion on a PC, 8.3. GA-X79-ud3 MB. Worked perfectly on this and other PCs and MACs for years and now this strange message. Any suggestions? Where is the folder that I must change? Terminal? I've looked a bit, but can't find anything.
PowerMac, OS X Mountain Lion (10.8.3)