Question re: Loading Amplitube replacement 86 to 64

Taking a project from my 32bit system which used Amplitube into my 64 bit system has a dialog appeear during the loading that tells offers me a choice of either the x86 or x64 version of Amplitube... I select the 64bit version and all is well... I save the song...

I open it and I again get the selection message for Amplitube...

This goes on forever... How do I get it to accept the change without going into the track, deleting the plugin, loading the 64 bit version and re-setting all parameters (I'm sure I could save them first but will that load from 32 to 64?)?

Any clues would be helpful...

Thanks
Keni