Can't save files in Excel for Mac

I recently loaded, then dumped a free application which has left toxic residue in Excel. When I try to save a new file, I get a window that says:

'resample_forMac.xla' could not be found.
Check the spelling of the file name and verify that the file location is correct.
If you are trying to open the file from your list of most recently used files on the File menu, make sure that the file has not been renamed, moved, or deleted.

I have tried to fix this by reinstalling Excel and it still didn't work! I've found a workaround; I can close the file and a working save window appears. It is a pain, however.
Thanks