I havn't used any Libre Office app since may 1 (which I know from the date on the last created document) and now when I try to launch any of them they wont open. There was an update May 12 so something must have happened. I have tried it on two different PC's with Windows 8.1 Pro 64-bit. I would prefer not to re-install since I've made certain changes but I can't remember what they are.
Have a nice day!
Edit: I made a fresh installation in a different folder and it works. Something in the last update must have broken my old installation.
There seems to be an issue with the launcher. When I observe what happens in the task manager I see that that it opens 3 different processes (the launcher exe plus two regular exe's) and they immediately gets killed. It is not blocked by windows defender.