DR15 Beta2: Resolve Freezes/hangs when exporting .fcpxml

Resolve 15 B2 freezes when trying to export .fcpxml
Only option is to force quit.
Yeah, I shouldn't have gone beta, seeing as I need to deliver for broadcast and have just finished grading the show.
Pretty serious bug for round-tripping (which I absolutely need for this show)
I've attached my logs.
Is there any way to get Beta1 again - I can't find it on the support page?
Mac Pro (Late 2013)
3,5 GHz 6-Core Intel Xeon E5
32 GB 1866 MHz DDR3
AMD FirePro D700 6144 MB
Only option is to force quit.
Yeah, I shouldn't have gone beta, seeing as I need to deliver for broadcast and have just finished grading the show.
Pretty serious bug for round-tripping (which I absolutely need for this show)
I've attached my logs.
Is there any way to get Beta1 again - I can't find it on the support page?
Mac Pro (Late 2013)
3,5 GHz 6-Core Intel Xeon E5
32 GB 1866 MHz DDR3
AMD FirePro D700 6144 MB