what do you mean reindex? my english is not the best, haha
don't know what the best thing is what i can do now?
i can't restart the client so this mean wallet.dat is dead. only when i overwrite it with with the backup it works
and the 11.0 download link i don't know there is no dmg files for mac
i try it with -reindex. into the console right?
Depends.
1st close the current core session and make sure its closed.
For Linux you start a terminal and enter
bitcoin-cli -reindexMac should be similar.
For Windows you open "run" by hitting Win + R, enter
c:\Program Files\Bitcoin\bitcoin-qt.exe -reindexand confirm with ok.