Luckily my PD 11 was still there so I could access them if I needed to. I have also managed to bring all the missing items into PD12 easily. Since this doesn't seem to be a problem for anyone I won't bother going to the trouble of listing how to do it.
On another point.. although you can add magic motion to all the images at once there still doesn't seem to be a way to choose or change the transition from the default fading one (crossfade). I have to manually select each transition & change it to the other one (overlap) which is very time consuming when there are a lot of photos. Would it be so hard to let the user choose which type of fade to use before it applies the effect? Little things like that make it annoying where it should not be.