Being unhappy with the last experimental version, I am putting the updated version downloadable from here: (note that there is only .exe file inside, no setup yet).

– insertion points and keyboard cursor are now wider for better visibility

– Shift+Space doesn’t work any more. ALT+Space is the way to toggle text/math typing mode.

There are some other minor improvements too… I labeled this version v1.71 beta, although it would be too soon to call this 1.71.