If you have a single working environment, and view every editing session as just a continuation of the previous one, then you’ll want to enable the Tools > Options > General > Remember Open Files and Projects Between Sessions option and otherwise forget about workspaces:
This way you can always just close APN without much concern (it will prompt if necessary to save any files that have been modified) and come right back to where you were when you later relaunch it.
Note that even if this is your normal mode, you can still launch APN in the Ad Hoc mode by specifying the --vue <filespec> command line switch. In that case, your ad hoc session will be independent of your standard workspace-enabled session.
The main downside of this mode is that unless you are diligent about closing files when you’re done with them, you’ll tend to accumulate a lot of open files, which will steadily increase the amount of time it takes to open APN (since it has to parse all those files as it opens).
