well i found a problem just like yours
it was one of the windows upgrades installs dx 11, which seemed to cause issues,
so i uninstalled sdkx10.1 then re installed it, took 2 attempts to re install but since then been purring like a kitten.
i also noticed an error with my tgc grass segments, they seemed to stop any enemies friends etc from leaving that segment, so i did a bit of messing around and found some good segments and now all is wonderful except fpe animation scripting for characters non human form is a nightmare.
if any issues or help needed on sorting out grass segments do not hesitate.
an unquenchable thirst for knowledge of game creation!!!