Go launcher Ex (Deutsch) not opening anymore

I am using Go Launcher Ex (or go launcher Z), german version, on my sgs5 and since the update last night (today is the first of march) I cannot access it anymore. As soon as I press the home button or access it through google play --> open a message appears in the taskbar, saying that an unexpected error happened. Clicking on this message allows me to send a log to the Dev team, which I did. But I hope that maybe this website is faster in answering because it's now been over 12 hours without any un-automated response. I understand that it's difficult to manage an app with so many users, but with SUCH a bug...

Anyways, I hope you have Ideas what I can do. I tried: - clearing Go Launchers Cache - stopping Go Launcher and restarting it by pressing home again - search for the last stable apk on google, which I didn't find (also, the version displayed in the app details is Go Launcher Z version 1.0.0 ...)

I did not try to restart the phone because in that case, I might not have access to google play anymore which I use right now to start the apps I need to.