You can start the IDE twice, right. Or three, four or more times. That´s not a bug; it´s a feature.
You are making the confusion by yourself. Why you open a project if you just have opened it?
I use multiple machines, when I sit behind the next one I open the project again.
And when using a lot of programs the windows taskbar is starting to use scroll button so it's not always visible at first glance that there is a B4A icon there.
What I request is a common feature since years in a lot of software so it's not really rocket science what I'm asking.