TB mail sudenly missing ??

i use the latest version,45.6
normaly i always make a backup, not this time
when starting TBmail, i cant read the mail.
i see the headers,names, subjes, bun when i click on a mail to read, its all blank.
on every mail !!
what is going on ??, what went wrong ??
any sugestions to fix this ..
or is there a previous version to download,