Not that this really helps, but I too am experiencing the same issues with NMM displaying no data after it updated to 0.19.0, and I can't even use the "Download With Manager" button on mod download pages. If that is one of your concerns, I would recommend downloading the mod(s) manually, then using the "Add Mod From FIle" button on the NMM. Just select the downloaded zip file and NMM will install it that way. Hopefully this will be fixed soon.