uman, if you tested a level, then a universe.dbo will be in:
C
rogram Files\The Game Creators\FPS Creator\Files\levelbank\testlevel
for your last tested level.
as for the grey screen, that does infact mean that your level loaded. People seem to be having problems finding theire level in 3d space. So, in other words, you have to look for it-LOL
it also depends on how high your level is when you built it. Levels on the 20th floor, will be quite high, and you will have to hold shift to see them.
if you select the help item, there is a good explaination on what to do.
in the mean time, i will work on a way to always have the level visible, but that will take some more reverse engeneering on my part