Hello NOKNOT,
This message box can appear if you have several our products installed. Some of them use common components, so if the installed common component is newer then those that in the update you would like to install next then you'll see such message.
I read somewhere that you are supposed to uninstall previous versions before updating. Is that correct?
If there are error messages while installation then it is recommended before the new installation to uninstall the product with removing the current user settings using Start -> All programs-> Solveig Multimedia -> SolveigMM Video Splitter -> Uninstall or using the Control panel.
In all other cases to update the product just launch the .exe file of the new version.