This dialog box appears if the PureCoverage Viewer is open when you run the program you are testing. It allows you to select how to handle coverage data from this and future runs. The selection is in force until you close the Viewer.
You can select one of the following:
Reload changed .pcv files, to merge the data from the run with the data currently displayed in the Viewer.
Reload now; automatically reload in the future, to merge the data from all future runs without displaying this dialog.
Don't reload, but inform me of future changes, to prevent merging data from the current run into the Viewer while leaving your options open for merging data from future runs.
Don't reload and don't inform me of future changes, to prevent automatic reloading and notification of changes.
Note that you can reload data manually by selecting File > Reload all in the Viewer.