Using 3.3.4 I can't seem to import Pixel Map Media on a clean install of ETCnomad using the CIA Import => Pixel Map Media => All Pixel Map Media. It appears to complete successfully, but the content isn't available and about still shows "Pixel Map Media Not Installed"
As a workaround, copying the supplied media to ~Documents/ETC/Eos/MediaArchive works as expected and restarting Eos after this shows Pixel Map Media Installed and it works as expected, but the actual import feature seems to have an issue.
Tested on both Windows and MacOS with the same result.