Problem & Reward offered

I have installed my wallet on my macbook since yesterday, the setup went pretty quick but since this morning my wallet crashes instantly when starting the qt file.

I get this error, what can i do?

Assertion failed: (hashPrevBlock == view.GetBestBlock()), function ConnectBlock, file main.cpp, line 2050.
Abort trap: 6
logout
Saving session...
...copying shared history...
...saving history...truncating history files...
...completed.


Assertion failed: (hashPrevBlock == view.GetBestBlock()), function ConnectBlock, file main.cpp, line 2050

I Have made a recover.dat file, but i really don't know how to make that work. If anyone could help me with one or both options i will reward you with 1000 Colx Just leave the adress with your answer