Hi eracerhead,
Sorry to say, that feature's quite dead for the foreseeable future. Reason's are two-fold: 1) I'm really time-constrained this summer between work and some life things, and 2) I wrote the interface using python and PyQt5 - neither works well with .dds files without requiring some additional libraries that cannot be pre-packaged.
Totally understand that a livery editor/browser would be expected to contain a preview window (kind of embarrassed not to have it, honestly), but them's the breaks.