There is an option, and not always an ideal option depending on hardware location, but in the event of crash and your lights holding the last values for effect, you can disconnect the DMX cable from the Daslight interface so the lights do not receive the '0' value command sent when the software restarts.
Then once the software has restarted and show file is loaded and playing a scene, you can reconnect the DMX cable. Unless you are playing the exact same scene which values were held by the lights at point of the crash, when being reconnected there may be a jump to the new light output/position.
There is also an option to have basic scenes written to Stand Alone mode so when the software crashes, it reverts to this basic state to avoid a blackout scenario. Due to your lights having a hold setting, it may not be relevant, but it is handy to those reading who may not have a hold feature on their fixtures.
Daslight Technical Support