Update:
Tried version 2.0.0.5 without AV on - same result, DCS crashes when loading mission
Tried version 2.0.0.6 without AV on - same result, DCS crashes when loading mission
My thoughts were that this is a permission issue despite that I am a local admin,however with Win 10 you can choose to use local accounts or your Microsoft account. I am using the latter (MS account).
Logged out of the MS account, then logged in as the local user, started uMFCD, then DCS and DCS mission loaded without issues (uMFCD status was running). There were no exports present, but at least DCS didn't crash.
I then logged back into my MS account and started uMFCD, then DCS, loaded a mission and voila, uMFCD was working with a export!
Win 10 Note
Note sure if the other Win 10 users did the upgrade of the operating system and then a fresh install, however I only did the upgrade. Whether that is relevant or not I'm not sure, but thought it was worth noting for completeness. DCS v1.5 was reinstalled post Win 10 upgrade.