[Evolution] all mails are deleted in all folders after deleting mails in search folders unmatched

[Jos Rikhof <jbrikhof gmail com>]

all mails are deleted in all folders after deleting mails in search folders unmatched. Only mails of last search are still there. 

I checked the content in /home/me/.local/share/evolution/mail/local/.OneOfTheFolders/cur

result: no content at all. 

There shoud be around 2000 mails, gathered during about 10 yrs. 

I renamed folders.db, resulting in creating a new folders.db. 

Is there a way to recover my mails. 

Number of mails is about 10.000 over 12 yrs. 

Thanks for your help. 

Mit freundlichen Grüßen,
Met vriendelijke groet,

Jos B. Rikhof
T:0031 (0)53 5387831
M:0031 (0)6 53621101