Font / Coding Problem with EndNote X1 on Linux

I have been using Endnote 6 under Linux with wine for two years and it works perfectly (no display problem, even for French characters such as ç and é or German ones such as ß or Ü).

However, I am getting more and more references with author names comprising unusual characters that are not handled by Endnote 6 ( such as Š and č) and it is becoming impractical to edit them manually in all bibliographic outputs, so I am considering moving to a newer version of Endnote that supports Unicode.

And here is my problem: I tried today installing Endnote 9, the install went fine and the special characters are displayed well within the upper window (the one with the list of bibliographical references), but are totally wrong in the lower one (the one with the formatted output) and in the window that opens when I double-click on one citation to open it (for instance, "génétique" becomes "génétique") .

I have this feeling that this problem should be easily solved, since the Unicode display looks fine in one window out of three! However, even after spending my day on it I could not find any way to fix it.

I know that some other users on the forum experienced a similar problem: has any solution been found since then?