I have installed the application, loaded a video and applied some effects, then used the Preview button and the rendering was working just fine. I am using Windows 10 x64 with latest version of Media Player, XviD codec installed and all the updates applied.
I recommend applying all the Windows Updates, then if you have the possibility reinstall the software and repeat the whole procedure related to video editing and it should work.
If you still have issues, right click the setup package and choose Properties > Compatibility. Select a previous version of Windows from the drop down list and then launch the software again.