RM-8 window program size on PC

I know this is a minor bug, but I would hope it might be an easy fix for the developer. When I open RM-8 on my PC (Windows 10), I normally hit the little square in the upper right hand corner to maximize the program to fit the entire PC screen (double squares icon). If I then go back to my desk top to work on something else, when I go back to RM-8 it has gone back to the single square size and now only takes up about 75% of the PC screen. So each time, I have to maximize the program size again. I was hoping that the view of the last use of the program would be held as the default view. Can this be fixed in the next update? Thanks!