I am using iDrive 5.0.1 on Windows 7 64-bit.
When I open the iDrive client to select the files for my backup, I don't see all the directories under C:\User\<name>\ that I can see under Windows Explorer.
I do not use the Windows Libraries (Documents, Music, etc.), but I do have specific folders under C:\User\<name> such as "My Documents", "My Music", etc. Not all of these show up in the iDrive client, so I'm not sure how to make sure they are backed up.