Well Guy's as you know this is way way above my head....i did kind of think that if the workbook opened isnt on my list in Control.xla then dont install the add in....if it is installed uninstall it or unload it!, i did try recording a macro where i unchecked the add in and then removed it but it showed up nothing in the VBE!

Would the installation/unloading an add in every workbook open cause problems with the network?

Regards,
Simon