Just for comparison:
In the disk copiers pack i maintain (shared in some sites) i got catalogued these different versions of TC programs:
Transcopy: 1.00, 2.20, 2.40, 2.60, 2.70, 3.00, 4.00, 4.10, 4.20, 4.30, 4.50, 4.70, 5.12, 5.18, 5.20, 5.20 (deluxe version), 5.30, 5.40
Some of these are not complete, but many has readmes, and tools as transedit, etc
Ver 1.0 file is dated 21/06/1985 and last version 5.40 is from late 1990 (july-september)
Comparing to Copy2PC versions (only software), first version 1.0 is copyrighted 1982 (file date jan/11/83), and last version 6.00 is dated oct/11/1990
Note: Long time ago i remembered all this story about copy2Pc and transcopy newer versions (also in copywrite versions) being worst thant certain older versions, so i keep all versions i got. Also some other programs worked this way, better=not fully complete, for example about Teledisk:
From:
http://www.oldos.org/Downloads/MSDOS.html
"Note: Versions after 2.11 may not work reliably with a 40 track, 360 kByte floppy drive."