extra small font size in "TDE Control Module"

greetings, folks, through inadvertence I wiped out my Linux partition. I restored my files but I didn't have a backup of the system so I installed a new version of q40s (which runs a version of TDE). I use a prior version on another laptop I don't have access to right now. then began the misadventures with font sizes in this HiDPI laptop; I got some help from the list (thanks!) last yr with such problems on a similar laptop. I've wrestled them to the ground for the most part but the windows labelled as "TDE Control Module" have teensy font size. where do I find the file that regulates their appearance? thanks for the advice. fjd -- Felmon Davis