Thank you. Since posting my message I've progressed (?) in my installation, and there is now a lang,tmp file in place.
I'm now getting Server Error 500 when I click 'Admin'. Also in the Xampp Control Panel I get:
Current Directory: D:\xampp
*** WARNING: DIRECTORY MISMATCH ***
(The Install directory is blank)
I extracted the new files into the D:\ directory, and I thought I didn't need to run the install bat file, but perhaps I do ?
Isle of Mull, Scotland
OS=WinXP Home SP2