I don't know what happened, but today file association started to work for FreOffice 0.3-0. Firstly I upgraded from 0.2-9, but then I decided to completely remove app and make fresh 0.3-0 installation. I made fresh installation few days ago and again yesterday, but in both occasions nothing changed. After every procedure I rebooted the phone. Because there was no success I decided to leave the things as they are. After that (yesterday and today) I tested few new app which I installed and removed, also I rebooted the phone after every procedure. Then few hours ago I was looking something in File Manager and accidentally press on one document which initiated FreOffice.
So, now I can open directly from File manager and email client doc, docx, odp, ods, odt, pps, ppt, pptx and xlsx files.

Issues:
- some pictures in pps and ppt presentation* are not visible, but text on top of them is visible;
- the same presentation in pptx format has visible all pictures, but text on top of them have black background and because font is also black, text is not visible;
- the same presentation in odp format is without any text, but all pictures are visible;
- ppsx files are not supported and have icon with question mark;
- some odt files cause crashing, which is actually not related with file size;
- xlsx files have icon with question mark.

* I have same presentation in different formats (pps, ppt, pptx, ppsx and odp) which all work great on PC (OpenOffice).


Swing option in presentations is very nice!

I couldn't test xls files because I have them associated with Gnumeric. Another thing, I don't use DocsToGo and after I upgraded to PR1.3 I didn't install dbus-switchboard, so I don't have a clue what triggered file association.