This is the answer of Michael in the site Yamaha-psr-styles:

Subject: Program to set CASM Editable flags to "yes"


There have been several posts about how the "Enable Edit" flag, encoded
for each part in a Casm, controls whether or not you can edit that part
in a PSR. When it is set to "No" (the Yamaha default on all but rhythm
and sub rhythm parts) , the PSR forces you to delete the contents and
enter all data.

To make it easier to change the default enable edit settings, I have
modified the program StyleEdit so that it now will enable editing of all
parts of all sections of a selected style with just one click.

The program (Version 1.2.3) should be available on Simon's site in 2-4
weeks. For those who might want it sooner, I will be happy to email a
copy. If you already have StyleEdit installed, please advise and I will
send just the updated StyleEdit.exe which is approximately 100 kb.
Otherwise, the full package is about 2 mb.

Regards,

Michael