There is known bug issue for FITpro.DotNet 1.1 version.
When FIT project has suites files inside and the suite designer was opened inside Visual Studio, the window suite designer is not closed by Visual Studio during closing the whole solution. So user has to press the close button for suite after solution is closed.
It should be resolved because all functions are worked in the designer after...
Steps which can emulate the situation.
1. Create a new FITpro project in VS
2. Add a new Suite Item to the project
3. Open the suite designer
4. Open fit test desinger
5. Close the solution
6. You will see that all files are closed instead of suite desinger.
7. Close the suite designer.