Libreoffice causes my System to freeze?!

Changing users doesnt really help, the loading banner reaches 100% and it doesnt freeze anything, but the Program doesnt actually open.
Ive removed the config, but as I tried the reset again, the libreoffice-startmenu is unresposive and cant be killed even with shift+delete in Ksysguard, and i dont know how else to kill it. So as I cant open another instance, ill restart my pc, which might take a while as it gets stuck. (as mentioned above)