Market Place content not working...

Ok - I’ve spent a bit of cash on numerous pieces of submitted content from the market place and while none of it says it’s compatible with 4.6 - when using 4.5.1 some of it works and a lot of it doesn’t work as it freezes up the program when trying to load it into a scene - realistic rocks come to mind. Is there some way to update the content so it works with all versions of the editor? Like just making it plain FBX? So it simply works?

The Mac version is still buggy and slow even with 4.6. Having all this content we’ve purchased not working is even more frustrating. The whole point of buying content is to simplifying the prototyping process… if it fails to deliver what’s the point?

Can I get a refund on stuff that doesn’t work?