XL Reporter installation problem

Hello,

I'm currently running SAP B1 2007, and have removed XL reporter from my add on administration in SAP because it wasn't working. I also deleted the XL Reporter files in the SAP > Add-on folder. However, when I try to reinstall the XL Reporter *.ard file via add on administration, it says that the new or the same version of the add-on is already registered. Any idea on how I can get rid of this?

Regards,

Lazar