Hello!
I have been happily using LO 4 for quite a long time, recently on my new laptop with windows 10 and 16 GB ram I decided it was time to upgrade to LO 5, but I had the feeling it was not working properly with my 4K monitor so I tried to upgrade further to 6.0.2.1 (x64) to see if it fixed itself. Unfortunately I still have loads of problems when I try to modify a style both in writer and impress, or the slide dimension in impress and so on. The box takes up to 60 seconds (not exaggerating here!) to open. I really cannot wait that long just to change one style!
I cannot figure where the problem could be, the files open with no big deal and I can work with no problem, unless I try to change any of the document properties!
Regards
Lila
UPDATE: seems fixed in 6.0.3.2