1.4 firmware upgrade

I would like to know if it is possible to upgrade the firmware but still use older tsi files. I love the custom (thanks Ean) tsi file I have now and wish to keep it. On the other hand I would love the upgrade of the vci unit. I played on someone who did the upgrade and I like mine better. Is this possible or do I just stick with what I have?

There's some issues with the higher resolution of the jogs and pitch faders. Your best bet would probably be to upgrade and take advantage of the new features, but build your own mapping based on what you want.