Please follow the steps in the readme file in this link

https://yadi.sk/d/fcZgyES73Jzj5T

The trick is to download part of the blockchain data as an archive and unzip it into the concerned folder of the wallet. The syncing become very easy after this process.

VERY IMPORTANT : DO THIS PROCEDURE ONLY AFTER MAKING A BACKUP OF YOUR WALLET SEED (WRITE IT DOWN OR STORE IT AT SOME SAFE PLACE).