I'm still using good old ver 11 for production. Many (not all) of my ver 11 projects cause the VMS 14 crash.
I've sent a couple of the automated trouble reports but just submitted an official report for a ticket.
I know there's a lot more to do on this, and it may take some time to go back and forth with it since I'm busy with video shoots and a lot of post, but I wanted to share it here. Below's the information VMS 14 generates. For me it appears to be the same error every time.
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Extra Information
   File:                C:\Users\frobbi\AppData\Local\Movie Studio Platinum\14.0\dx_video_grovel_x64.log
   File:                C:\Users\frobbi\AppData\Local\Movie Studio Platinum\14.0\svfx_video_grovel_x64.log
   File:                C:\Users\frobbi\AppData\Local\Movie Studio Platinum\14.0\ocio_x64.log
   File:                C:\Users\frobbi\AppData\Local\Movie Studio Platinum\14.0\dx_grovel_x64.log
   File:                C:\Users\frobbi\AppData\Local\Movie Studio Platinum\14.0\gpu_video_x64.log
   File:                F:\GreyFox2016\ProjectFiles\GF16-GatherRounders-2-b.vf

Problem Description
   Application Name:    Movie Studio Platinum
   Application Version: Version 14.0 (Build 105)
   Problem:             Unmanaged Exception (0xc0000005)
   Fault Module:        C:\Program Files\VEGAS\Movie Studio Platinum 14.0\FileIO Plug-Ins\compoundplug\compoundplug.dll
   Fault Address:       0x000007FEC67AC89B
   Fault Offset:        0x000000000004C89B

Fault Process Details
   Process Path:        C:\Program Files\VEGAS\Movie Studio Platinum 14.0\MovieStudioPlatinum140.exe
   Process Version:     Version 14.0 (Build 105)
   Process Description: Movie Studio Platinum
   Process Image Date:  2017-02-15 (Wed Feb 15) 04:09:48