'Add Hitfilm Effect' via right-click a clip on the timeline, edit the clip in Hitfilm Pro (latest version). Exit or Save clip will prompt to replace the project file with the new version of HF8.1 You then can see & work absolutely fine with the roundtripped HF project file in Vegas, until you save
Once you save your VP project and reload, it first causes a fatal crash, at re-open you will get prompted to replace/find/ignore the Hitfilm files. None of the HF8 files can be imported. All greyed out in the project media list.
I think this only just happened..and it seems it's on the Magix' side..As I can easily re-open any file in HF and keep editing..This is a real big bummer as this is the only good 3D animation / tracking roundtrip plugin I know and currently use..; Also, pls don't confuse this with Ignite plugins [which seem to work fine]