It seems SendKeys is totally "gone" for widows10....... https://community.spiceworks.com/topic/1560398-adding-the-enter-command-in-batch-file-without-using-the-sendkeys-command
Of course UR might not have been using it....... but probably was.
I will have a look at Lua....... and try to work out if that is the problem.
Does the UR built in keyboard work?
If it does then that would suggest another problem.
If not, then as in the link in the last post, it could be a problem of different levels of permissions.
If it works on another PC and not with Widows10 then it might be because Microsoft recently broke (on purpose) "SendKeys" in Widows10. Others are having this problem with other software that sends keystrokes..... but like you.... only recently and only with Widows10.
Google will soon be plastered with similar complaints and hopefully some solutions.
It will not help you, but there is a discussion here https://www.tenforums.com/software-apps/49635-sendkeys-not-working-windows-10-a-3.html?s=c1a4d5973e77479c647b5fa91690bda5
I purchased a bunch of windows7 licences a few years ago. Using Windows for live performance I could not entertain an OS that changes from day to day!