I dont like the feature opening multiple projects.. I find it VERY messy and make mistakes very fast.. Is there a way to turn this off? Usually i went to console and then turn it off by setting FE.AllowMultipleOpenProjects to false, but that doesnt work anymore.. Adobe is forcing me to use the multple projects.. I Dont want this at all!
The easiest way i am aware is to only use one project at a time. If i open Project A and need to make a change to Project B i simply close Project A and open Project B and when done, close Project B and open Project A again. By doing this i only have one project open at a time. It´s a workflow thing. Ignoring to close projects and just open up project after project is a recepie for problems, at least for me and that´s why i always avoid it. 🙂
The direct answer is: As far as i know there is no Preference setting to stop the end user from opening multiple projects.