Yes you could try rendering using the command-line interface (qmelt.exe). Basically:
- start the export in Shotcut,
- stop the export,
- copy the XML to a file,
- stop Shotcut,
- restart your computer
- then run
melt.exe
with the XML file before starting any other applications.
See here for more details: http://www.fredshack.com/docs/shotcut.html, or here for the Dan’s instructions: Command line rendering