Thanks to user40849, i managed to solve this problem. His answer is not very detailed, so i'll give a complete answer.

First, you need to reboot in safe mode. you can accomplish this by starting up your phone and then holding the volume up and down button at the same time untill the phone is started. You should see the words 'safe mode' in the bottom left corner of your phone.

When you are in safe mode, you can't see 3rd party apps in the list of all apps. To remove the laucher, you have two options:

Remove the launcher in the settings: Settings > Apps > Turbo Laucher > Delete

or remove it via google play: My Apps > Turbo Launcher > Delete

Now just reboot your device normally, so you're back in normal mode, and the laucher is deleted!