Virbedit won't associate .fit file to 360 video file bigger than a certain size?

SO I have rendered 32-36min 360 videos at 5.6k in gopro quik - but once i concat the 8 min gopro files together and import the 32-36 minute videos into virbedit, the .fit will will not "associate" to the video file. The g-metrix tab just says "there is no g-metrix for this clip"

I have done it to a 24 minute video - is there a certain file size limit in virbedit?  the files are 50-60GB