Everyone having the issue of simple wallet showing 0 received blocks.
You need to restore your wallet via the seed that was given when the wallet was created.
To do so, create a .bat file and place following commands in it:
for linux: ./stellite-wallet-cli --restore-deterministic-wallet
for win: stellite-wallet-cli.exe --restore-deterministic-wallet
save and start the .bat file.
It will ask you to name your restored wallet, set a new password and type in the seed.
When launching simple wallet afterwards, it will receive blocks and your balance will be shown.