In LimeWire go to the Library---- highlight the incomplete folder.

You should see your incomplete files there>Highlight the file --- then click resume.

This should move it back to the download window.

You can also do a manual search for the file. You will see the file when it is located, but it will have a rip through it. You can then highlight and select download. It should pickup where it left off.

Those are 2 ways I know of to get the file to resume.

Best of luck