I never tried downloading a pre-made one (maybe I should ?). But I created half a dozen themes myself. They all show up in the theme list. But when I try to load them, I get ... nothing. Or next to nothing anyway. Here's what a lot of trial and error reveals.
If I just make color changes to various fields, they will load fine. If I change IMAGES, however, then I have problems. They just won't load.
I checked the .dlt file - they all have IMAGES folders, and the correct images are in there.
I checked the .xml file (as IF I know anything about that stuff). They do show the correct corresponding image files that the theme requires. But they ALSO show image names for all the other fields as well - images that I used once in a different theme, for example, are shown in each .xml file. !? Maybe it's supposed to be that way. I did try editing one theme .xml file to delete these extraneous references. I managed to crash my system (!), but the change did no good.
And when I load a 'bad' theme - there is zero reference to the images that I asked for. For example, if I told theme #1 that I wanted 'blue.bmp' as the file display background, everything looks fine -- it's in the IMAGES folder of the .dlt, it's referenced in the .xml (along with lots of other images for other fields that I didn't ask for on this theme). But when I load that theme -- the image doesn't load, nor does it show as the image for that field for that theme.
?!? Sorry to be so wordy. Was hoping you might have some spiffy suggestion for me. Oh, this is 22.214.171.124 if that's important.