It seems Dataviz has released the premium of version of its documents suite.
It's a 30 day trial as was the viewer.
Unfortunately their website does not say anything about it (except a title) and the upgrade link for those who bought viewer editions does not work.

It is visible both on Ovi store desktop and phone

Here's the link to ovi: http://store.ovi.com/content/21583?clickSource=homepage

hers the link to dataviz:
http://www.dataviz.com/products/documentstogo/maemo/