File Menu

The File menu holds the commands that open, save, close, export and build a project. Saving and exporting explains the first four.

The File menu open below the menu bar with no project loaded, in five groups divided by lines. New Project, Open Project, Open Recent and Exit are available, and every other item is greyed out. Each item has an icon except Open Recent and Close Project, and five show a key at the right: Ctrl+N, Ctrl+O, Ctrl+S, Ctrl+E and Alt+F4.The File menu open below the menu bar with no project loaded, in five groups divided by lines. New Project, Open Project, Open Recent and Exit are available, and every other item is greyed out. Each item has an icon except Open Recent and Close Project, and five show a key at the right: Ctrl+N, Ctrl+O, Ctrl+S, Ctrl+E and Alt+F4.

The commands from Close Project to Clean work on the open project, and are greyed out when none is open.

Open and close

New Project… (Ctrl+N) and Open Recent…
Open the New / Open Project dialog, on its New tab and on its Recent tab. Nothing is closed until you press Open in it. See New Project and Open a project.
Open Project… (Ctrl+O)
Opens a project file, or a .vbp file, which is imported as a new project. See Open a project.
Close Project
Closes the project, after a question if it has unsaved changes. It has no key. See Close Project and Exit.
Exit (Alt+F4)
Closes the project, after the same question, and ends the IDE.

Save

Save Project (Ctrl+S)
Saves the whole project, with every open editor. For a project with no file, it asks for one first. See Save Project.
Save Project As…
Saves the project to a file that you choose, and keeps that file as the project’s. It has no key. See Save Project As.
Save Current Document
Is always greyed out, and has no key. The IDE saves the whole project, not one file.

Export

Export Project… (Ctrl+E)
Writes the project out to a folder as separate files, after it deletes everything in that folder. See Export Project, and read its warning first.

Build and Clean

Build
Compiles the project into the file that the Build Output Path setting names. The project templates set it to ${SourcePath}\Build\${ProjectName}_${Architecture}.${FileExtension}, a file in a Build folder beside the .twinproj. ${Architecture} is win32 or win64, as chosen in the build configuration box on the toolbar. It has no key.
Clean
Deregisters the previously built DLL, if there is one, and deletes the previous build file. It has no key.