Forte stores a log of useful information in a text file call FORTE.LOG. FORTE.LOG is located in the user's application data folder. This folder has been located in different places in different versions of Windows. As of Windows 7, it is in the C:\Users\<username>\AppData\Roaming\brainspawn\forte 3 folder. A handy way to access this folder is to start Forte and select the menu command "Tools|View INI Files and application data folder" which opens the folder for easy access.
The Log file by default only stores warnings and errors. You may select a higher level of logging in Options|Preferences|General. See Logging Level for more information.