As mentioned in the FAQ, you can use F10 to save your song (and F9 to load one). reViSiT will also automatically save all song data whenever you click Save in the host application. So, for example, if you're in Cubase and you save your project, all reViSiT's data will be stored in that project file and automatically reloaded when you next open it. The next version of reViSiT (v0.87.2 - due soon), has a working File Menu (in the main menu) and also adds Ctrl-L and Ctrl-S alternative shortcuts for loading and saving.

Chris