This seams certainly related to a bug in iDrive :
- standard Windows (or Unix, or Linux...) filesystems coherently refuse to delete a directory if there's a file within them.
- uninstallers coherently assume this, and try to perform a removal of the directory they created (for example the installation root directory)
- iDrive seams to honor this deletion, regardless of whever there are other files or subfolders in this directory whose deletion wad attempted.

This is a major bug in iDrive, not LimeWire. iDrive is an addon for Windows, and is clearly unsupported,either by Microsoft or by any other tools. Claim your bug to iDrive, and insist on this big security hole in their implementation !

Note that this may also be a limit on the iDrive policy: you may have exceeded your online storage policy, and online storage of copyrighted files may be a reason why they decided to cancel all files in your online account, or they decided to block access to your online files because you did not renew you online account in time, or forgot to pay for your excess storage. iDrive is no more a full Free service, and using it to share files between users may be a breach to their online policy.

So read your user agreement, and then check this bug with them.