This is/was an ODD DUCK
ya I could save a single part, then another part, but on saving a few .. crash n burn
Thanks for the response Alex and ALL who got thru the forum. Alex I emailed several times going back a month or since the day 5.4 was released. You're (common sense) statement "Alex will look into credible troubles" led me to believe it was my install/pc but then I installed on a fresh PC and had same issues, I just stopped emailing support at as well as alex at ...
So we thank you for identifying work around but I'm not clear if we have a good contact for email support, or if support is only via forums - which is fine by me

just let me know if possible.
STILL LOVE your product, services and EFFORT as I think we be a community of supporters.
a bug .. UE has had no bugs !!