When selecting menue entry "File" / "Start New Session", not all values in column "Session Time" are set to zero. A few stay at their old value. Selecting "Start New Session" multiple times helps setting all values to zero. This happens, when the table of tasks is sorted by "Session Time" descendingly. If the list is sorted by "Task Name", the problem does not happen. Reproducible: Always
Hello! Sorry to be the bearer of bad news, but this project has been unmaintained for many years so I will be closing this bug.