Could you add support for .3FR & .FFF please? Or at least .FFF ?
I spoke with our developers, and we're not going to work on this at this time. Hasselblad doesn't embed previews in their RAW formats, so even with direct support for the file format this would still be slow. You can use RAW rendering with Adobe DNG Converter now, but it's still going to be slow. Your best bet is to try converting the files to DNG, which should be much faster. If Hasselblad were to start embedding previews, this would be a totally different story and it would likely make sense for us to start supporting their format.
Please feel free to call or email support if you have any questions.
Thanks - I understand the issue, and yes, it's a bit of a blocker :-(