SIX2XTND(C) Version 1.2.2 06/06/87 - PATCH FOR TRSDOS 6.2.x Model 4 

Note from Dave Keil (who created this image)

This software consisting of a set of patches and a conversion program will enable you to continue to use your TRSDOS 6.2.x operating system past 1987 to the
year 2092. The USER password has been eliminated, but all other passwords remain. 

These patches are on a TRSDOS 6.2x data virtual floppy (.DSK). Read the docs in the .ZIP and on the .DSK for more info on what the patches do and how to
apply them. I applied this patch to both my TRSDOS 6.20 and 6.21 operating systems without problems (read the instructions carefully).