Possible bug (?):
I updated mame to version 192, so mame64.exe changed. When i opened Emuloader 8.3.3 the previous list of games was there but icons/snaps/docs etc wasn't showing.
Going to Mame Arcade -> Emulator setup i noticed that Emuloader had lost the path to mame64.exe
After reselecting it everything was back to normal.