load HALion 3 vstpresets from mediabay into HALion 4

after having (a long time ago) imported countless fxp and fxb files from HALion2 into H3 and storing them as vstpresets in the mediabay I am now facing a problem importing those H3 vstpresets into H4. i get an error that H4 can not read the format.
how can i get my old H3 vstpresets into H4?