GPSTools 4.0.4 / Admin / Tracks : Clean Cache warning feature

If you click on "Clean Cache", you got an unexplicit error message... It is a failed, error message...

Because CLEAN CACHE to work, need you to select ALL TRACKS before. No warning, no message, no help to let you know!..

In others functions, when no track are selected, an error message WARN to SELECT tracks before to apply...

Could we have same warning feature on CLEAN CACHE?

Thks, Gil