Sony PEGA KB11 Keyboard "clie peg" Questions

Clie (PEG T415) and the battery was dead. After I charged it the clie opened as if it was new (this was Jan 1, 2009) and my files were gone. I hit reset but could not retrieve them. How can I retrieve

...Clie PEG-TG50/E organiser and have bought the small keyboard for it: a PEGA-KB100. Unfotunaely I have lost the CD that has the keyboard software on it. Is there a way I can get hold of the software ...