Before removing something check the names again. AFAIK, funcres.xla is MS add-in which comes with excel and provides additional financial and scientific functions. To remove its functionality, simply uncheck Analysis ToolPack in Tools>Addins dialog. This, however, will not remove it from the disk.
It seems that you try to remove the add-in by VB editor add you are asked for a password to view the project. If the thing was installed in an a programme-like installation, close excel first and go add/remove programs in control panel. It is likely that you find it here.
Anyway, it would be good to check application's name first.
combo