Problem with SFM

[w+m1 simulator]

Every time when I get in the game with F11,and then click F11 again,a gray screen shows with 5 drop menus,and 1 of them says switch to particle editor tool.Do you know how can I close it without closing SFM?

Another problem is:when i worked on a project,i blade half of the clip,i delete it,and then when i add a new clip,its just black screen

[Pte Jack]

Go to windows, game engine and select auto hide engine so that it is turned (checked) on. That may fix your problem.