Can't open LibreOffice 4.4 on Windows 8.1

I have Libre Office 4.4 in my Windows 8.1 laptop and after a few weeks of using it, LO suddenly wouldn’t open. I can’t use Writer or Calc even if I click them several times.

Any suggestions for me? Thanks!

How do you try to start LibO?

What items are you clicking?

The more information you provide, the better the chance is to help you.