I now had some progress in my attempt to get the dictionaries work.

As it was said in the original instructions (2nd message in this thread), you need to go to Plugins tab in QStarDict Settings and add the folder that contains the dictionaries in the list there. What was not told is, which folder you must actually give there.
It appears that the correct folder you must give in the settins is the folder that contains the dic folder.

For example, I have stored the files of fin-eng dictionary in folder
~/MyDocs/stardict/dic/stardict-fin_eng-2.4.2/

To make this dictionary visible in QStarDict, add the following folder in the plugin settings:
N900/stardict

In the list of folders in Plugins tab, this is seen as
/home/user/MyDocs/stardict

After adding that folder in the list, a dictionary is visible in Dictionaries tab.

But more problems still exit. It seems that only some of the dictionaries are accepted by QStarDict. I have downloaded 3 dictionaries:
- stardict-vera-2.4.2
- stardict-eng_fin-2.4.2
- stardict-fin_eng-2-4-2
Only the last one is recognized by QStarDict.

When I look at the contents of the directories, the difference is that the last one contains a file fin_eng.idx.oft, while others do not contain any .oft file. (But if I understand it correctly, QStarDict should create this file.)

--
Pauli