LO won't open on Mac Os 10.10.5, gets stuck in 'controlling'

Succeeded in downloading LibreOffice 5.2.2002.
When opening this program, it starts ‘controlling’ - all seems to go well and quick and then - when it looks like it’s ready - the program gets stuck.
Since it’s not opened I cannot go into settings and all that.
Have stopped, tried again. Given it time. Have given the whole computer a restart. Nothing works.
I wish and hope that you can help me! I’ll send you extra good karma if you give me the helping advice <3 !