Steps to reproduce,
1. Create new project in OmT 2.2.3_02 on Windows XP Pro SP2.
2. Add a source file, and press F5.
3. Remove the source file, and press F5 again.
What you expected to see, and
When a source file is loaded in OmegaT, the quick stats (bottom right corner of OmT GUI) should reflect the file's statistics, but when the file is removed and I press F5 (so that the project has no source file), the quick stats should show zeros.
What you saw instead.
The quick stats don't reset to zero. They still display the source file's statistics (as if the source file was still in OmegaT).
Quick stats still show statistics of previously loaded source file.
I can reproduce it with most recent version 6,1.0 Beta.
Raised pull request
https://github.com/omegat-org/omegat/pull/1603
It seems to me this one also applies to 6.0