Hello philebus,
Thanks for your question.
Unfortunately there is no such feature in Video Splitter at the present time. We will add it in Video Splitter future releases.
But you can delete it manually from the Windows Registry Editor.
To do it:
1) Go to Start > Run and enter "regedit". Registry Editor window will appear.
2) Go to HKEY_CURRENT_USER\Software\Solveig Multimedia\SolveigMM Video Splitter\AVITrimmerApp\Recent File List
and delete "Recent File List folder" or files which it contains.