I tried Office 2010 64-Bit with Engagement 5.7 running on Windows 7 Professional 64-Bit and....it didn't work. I tried faking Engagement out by manually moving the add-in files to what I thought were the appropriate locations but still not luck. I then tried to manually add them to the Office 2010 apps using the add-ins dialogs but I kept getting an error that seemed to say the code used in the Engagement 5.7 add-ins were not compatible with Office 2010 64-Bit (I don't know if they're compatible with Office 2010 32-Bit because I haven't tried it yet).
Anyone else testing Office 2010 using different combinations than I did? I'd love to hear you're experiences.
