I've been using v1.1 of MIG for a year, and just upgraded to 2.1. Generally, it works as advertised, but the Location of Scanned Images setting (Tools > Preferences > Advanced Settings) is ineffectual. It accepts directory names, but the scans are always put into C:Users//My Documents.
Is this a bug in the product, or the user? Running the tool on Windows 7 Pro 64bit.
Note that I tried the idea of "run as administrator" to get MIG to act on the Scanned Image folder, but the behavior was the same. Note that the app has always "remembered" the folder I was telling it to put scans in, it just wasn't obeying the setting.