Thunderbird portable doesnt show foders on WINDOWS PC after using on LINUX PC

Hi John,
first of all let me thank you for your reply.

I try to give you more details:
- I dont use IMAP account but POP account;
- I use Thunderbird on a USB Key and folders where I store my mails are located here D:\PortableApps\Thunderbird Portable\Data\profile\Mail;
- Inside Mail directory I have some other subdirectories which have the same name of my Thunderbird local folders ( I discovered it just today ) ;
- All these directories seem to be intact whit all my mails;

When I used my USB Key on Linux PC I saw everythings without problem. I used it without problem.

When I inserted my USB Key on Windows PC I lost my view of all folders on the left folder pane. Empty !!

How do to restablish the rigt situation?
How do to proceed in order to view al folders again?

I discovered to lost all filters rule too

I hope has been clear.

Thank you

Felice