I remember I had one back in the day, which means I would have got it from a Cover disk most likely.
I did use That's Write so maybe that's where I got it from.
I'll have a nose now I have some leads to go on, thanks again!
1977 VCS Heavy Sixxer (Boxed)
1990 Atari 1040STE, 4MB, UltraSatan, TOS 2.06, TT Touch -> Atari SC1435 Colour CRT Monitor
1991 Atari TT030, 2/16MB, Int 8GB Gigafile, TOS 3.06, CaTTamaran Accelerator -> 1991 Atari TTM195 19" Mono CRT Monitor
1993 *** NEW! *** Atari Falcon030, 14MB, 84MB HDD, TOS 4.04
Amiga 500, Win 3.11 PC, Several old Macs, Newton, SGI Indy, much more and counting!