Thanks for the reply, it was in flat water. I will pump it to 8 psi which is the upper limit of the green area of the pressure guage.
I also have a mate on a 10m V1 that has had the same problem if crashing the kite whilst learning new tricks. I know, I know - problem can be solved by not crashing your kite.
it is primarily the centre strut that folds into almost a z shape (viewed from side on). The only way I could effect a relaunch was to maintain tension on the lines and swim quickly around to the side of the kite. No matter what I did to try and relaunch normally (from upwind of the kite), it would not catch the wind with a wingtip and commence the relaunch process.
I also must say that, if the centre strut doesnt fold, this kite nearly relaunches itself