It's not hard to compile, assuming you have the tools installed. I just did it a few minutes ago myself using Ubuntu Linux in a VirtualBox machine on my Win10 laptop. You just need the usual gcc compilers, plus xa (cross-compiler) and avrdude. Then cd into the directory for your particular screen and use avrdude to program the eeprom_writer.hex and SDrive.hex files to your board. I'm about to go test the new build on my 1088XEL.
The odd thing is when the slot is empty it does seem to behave as 'off' in my tests, at least as far as the 1050 is concerned.
Yes, I compiled it on Windows 10 under in Ubuntu WSL (Windows Subsystem for Linux)
Thanks for the replies
If only I had HD space or a Memory stick to install Ubuntu again I could use this route, but not at the moment...