Thunderbird v1 - Not saving passwords

Folks,

I have downloaded and started to use Thunderbird v1 as my email client - 
  I've researched into this, including reading the FAQs which mention my 
problem, but not a working solution.

Basically, I have five or so POP accounts - All their email is delivered 
into Local Folders - Everytime I start Thunderbird to download my 
emails, it asks for the password for each POP account - If I leave 
Thunderbird active, it  will remember the password for that session - 
but once I exit and restart it again, I have to input my password.

Is there a work-round for this? Perhaps editing one of the user.js or 
some other type of file?

All help is appreciated, via the newsgroup only - thanks

Randell D.