[Analogus]

Ok, that's the way:

You know:
If PRS+ is installed once, upgrading is no problem even with a MAC:
Extract the PRS+ file (for example PRSP_350_2.0.14beta.zip). Inside you find update.zip, readme.txt and setup.exe.
To UPGRADE take update.zip, open it (it's an simple ZIP-file, MAC can handle it), put out the folder called 'PRSPInstaller'.
Copy this folder onto the reader.
Restart the reader --> upgrade done.

Ah, you want to remove PRS+ ;-) ?
Do the same. But: Before restarting and ev. copying open the folder 'PRSPInstaller'. There is one file called 'INSTALLER.SH'. Open it with a text editor (MAC can handle this).

The file is readable.

Around the 4th or 5th line you will read that:
To uninstall PRS+ comment the next line (put # in the beginning of the line)
cp -r /Data/PRSPInstaller/prsp /opt1/dict >> /Data/PRSPInstaller/install.log 2>&1

Follow the advice and put a '#' in the beginning of the next line.

Save it --> copy the folder onto the reader if necessary --> restart the reader.

A.