Hi there, I just got my Kindle Touch and, for whatever reason, I haven't got the tts files either. I haven't touched any folder nor deleted anything, the Kindle was brand new and had never been used before.
The only plausible explanation is that I live in Spain and the Kindle came preset to Amazon.es account, perhaps tts was not installed because it's not available in spanish yet...
Anyway, I changed my account to amazon.com and tried both rebooting and returning to factory defaults to no avail.
I discovered something was wrong when the Kindle displayed an error message while testing it as I got it out of the box. I'm not going to use tts much, but I certainly want to have it, if only because I paid for it. I'd be grateful if any of you guys could provide me with the missing files!