I'm trying to work on multiple projects at the same time, and currently Geany makes this a little difficult.

If I specify the project file in the Geany call, e.g.

geany myproject.geany &

Geany will re-use the running process and force me to close the current project before loading the new one.

If I launch a blank geany process:

geany &

then I can run an arbitrary number of Geany instances, but I have to manually load the project via the Project->Open dialog.

Can you please remove the check to re-use the current running Geany instance, and close the current project? I can't imagine why anyone would want or need that, since a single Geany instance can't handle more than a single project at once.