tcl/pd-gui.tcl

# set total_recentfiles 5
set total_recentfiles 10 

And if you want to avoid having to redo this every time you update pd just create a file called recent-plugin.tcl and put set total_recentfiles 10 in it, save it somewhere in your path. This has irked me for ages but it never occurred to me that I could fix this.

@oid is the name of the file you suggest .pd or .tcl?

@alexandros Fixed, thanks All gui plug-ins must be in the form of name-plugin.tcl.