If your Electron wallet is missing events follow these steps to restore events caused by damaged event dats.
On the Top Bar Select Tools and Info
Select Wallet Repair from the Right Side Menu
Select Delete BlockChain from the list of repair options
The wallet will restart at this point
From here you can sync from scratch or use the new auto-download snapshot feature
After you hit download snapshot your client will now begin to download and extract the latest snapshot and begin syncing from the last block. After your client restarts your events will now be restored.