that won't save mac thing

hello, i’ve seen this brought up before and have been unable to find a solution, there is a broken link to a solution i saw elsewhere here…
anyway, the problem is this:
when i try to save a project with toon boom 4.5 it says “toon boom is not a valid toon boom studio file”, twice actually.
incidently i also have that thing where the install disc icon and menu mount whenever i open tb.
i right clicked on the template library and got no “close” option.
i am the administrator on my computer.
i am using a duel intel mac with os 10.5.6
please help. i’m going a little crazy.

ahhhhh, figured it out!
was searching my mac library not the library actually in toon boom!
sorry everybody!