ExpressCache is no longer working after updating to Windows 10 Manual Fix

This  is rather frustrating.

Windows.old has now gone.

Tried uninstalling once so now there’s nothing to uninstall!

Tried re-installing (using ExpressCacheSetup,exe) but this fails to an error message “Please uninstall and re-run setup”

Now nothing to uninstall.

Then set-up says " System has not rebooted after uninstalling expressCache.  reboot the system and start ExpressCache installation"

I’m going round in circles here.

Can anyone help before I throw the thing away!