I thought V4.0 and V4.1 products would work with V4.2. Is the clothing, props, skins per each version. I figure the morphs/inj are unique per version, but the clothing etc went cross versions. I'm not stating a fact, I'm asking a question. 

I thought the V4.0, V4.1 clothes/skins went on V4.2, but V4.2 wouldn't go on V4.0, V4.1, or are clothes on all versions interchangable?.

Do I have to keep all versions of V4.0, V4.1 and V4.2 installed?

V4.2 Elite is now added to the mix.

DosPorticos is right...so many versions.