Hhmm, my menu is 2 or 3 times longer than what you showed. Mine is just like what you showed for 0.92. So I think you were missing a whole lot of formats there.
Would you be willing to reinstall that version? You don't need to uninstall 0.92. Just download the 7z version of 0.92.3, and you can "install" it just like with any zip file. The reason I'm asking that, is if there is a bug, that is a fairly serious bug, and we should get it investigated.
If you do reinstall it, and the problem seems to be solved, then I would guess there was a problem with installing it the first time. We won't know what it was, but at least we will know there's not a serious bug like that.
But if the problem is still there, you can help us to investigate. I think what Moini meant by "profitting from a bug fix" means that you could have the benefits of the font bug being fixed, as well as potentially the benefits of fixing the DXF (and many other formats that are missing) import bug (if it turns out to be a bug).
Or, if you happen to remember, when you installed 0.92.3, did you click on something that said something like 'update Inkscape over your previous version'. If you remember doing that, it would at least put our minds at ease about having such a serious bug potentially happening (it would mean the "update" option probably caused the problem - we already know about some other problems it causes).