attached you will find some Atari Basic Listers and Deprotectors I have in my collection. The program you are searching for is surely not among them, but maybe these programs are usefull too. The ATR image contains six programs:
BASLIST.BAS: one of the first Abbuc programs, this one can deprotect Basic programs that are protected with Poke Peek... usually in the last line of a Basic listing
RSTATION: the Repair Station, a compiled Basic program, it can deprotect various Basic list protections, except the one mentioned above in BasList.BAS (Poke Peek...); fixed programs are saved in tokenized form as *.FIX
LISTBAS.COM: another Basic deprotector by a german hacker; it can deprotect various list protections and show the listable file on screen, printer or diskette (on disk it is using the List-format, so you have to use Enter"D:Filename.Ext" to load it)
Deprot4.BAS: and another Basic deprotector program
Deprot5.BAS: yet another Basic deprotector program
Decode.BAS: still another Basic deprotector program
All remaining 1-sector files are extremely small tools that I use from time to time (e.g. Basic-off, Coldstart, etc.; usually I append games/apps/demos to them so they switch off Basic or do a coldstart when Reset is pressed, etc.)...
Greetings, Andreas Koch.