Carl,
Using the Plato IDE to develop and test a .f95 program, there are 3 main icons for runing/testing the program from within Plato. These are:
Compile (Ctrl+F7)
Build (Ctrl+Shift+B)
Start (Ctrl+F5)
Compile is used to test syntax and produces .obj and .mod files.
Build will hopefully produce the .exe file.
Start will run the program.
When selecting Start, if you have not recently used Build, then the .exe file will probably be older than the latest .f95 source file and so you will be asked the question. Select Yes and it will do a Build and then Start.
If this description agrees with your experience, then OK.
If your experience is something different, then you need to describe your experience in more detail.
John