@sonylxni notice there is 2 stable version of libre. what is the main diff between fresh and still version?
The interface is just like Office 2013 but better with tabs and such. I don't understand why MS hasn't brought tabs instead of opening them as windows.
Unlike Kingsoft Office 184.108.40.20650 , I believe WPS Office 220.127.116.1158 doesn't allow saving in .docx formatI upgraded WPS to latest and got the problem you got but I found a beta of WPS which is free without those problems.
You'll probably like it In the beginning, I almost missed the tab thingy Office 2007 brought with it, but it sometimes makes you search more, for that it just looks good and you still press the small icons in the corner of the tab to bring back the "old" menu from older Offices.