I have two add-in files (AddinA.xlam & AddinB.xlam). I decided to
consolidate them into one file with several different modules. So, I
moved all of the modules in AddinB to AddinA and deleted AddinB.xlam.

Now, every time I open Excel, even with a new workbook, I get this
error message:

'C:\Documents and Settings\Administrator\Application Data
\Microsoft\AddIns\AddinB.xlam' could not be found. ...

I have searched all of the relevant workbooks, none of which are open
when I get the error message, and cannot find the string "AddinB"
anywhere.

How do I get rid of this error message?