I used TB as a hard disk installation to also read emails with PGP encrypted attachements. I like the concept of having TB as portable version, and installed TBP to my USB device. I also imported my PGP keys from my hard disk. I don't get to read email that contains encrypted attachements on other PC's. Is this a TBP issue, or may I have to install additional software? Would this prevent me from using PTB on any PC?