Incredibly slow dialog opening

Hello. I have a problem with LibreOffice v5 (I tried 5.1.1 and 5.1.3). I am aware that it was asked before, but solutions offered in there are not helping me. Problem is occuring in Writer and Impress afaik.

I recorded how it looks exactly: https://www.youtube.com/watch?v=ApLa2OASev8
(“brak odpowiedzi” means “not responding”)

For some reason only dialogs that are meant to do something with the document are utterly slow to load. LO preferences window shows up instantly.

What i tried:

  • updating gpu drivers
  • forcing opengl usage
  • disabling Java environment
  • disable/enable openCL
  • recreating profile
  • reinstalling
  • swearing

PC specs:
CPU: AMD Athlon X4 860K Quad
GPU: MSI GForce 750Ti

System: Windows 10 - ver 1511

(Sorry for any language/grammar errors)