I have tried a few times and it seems that either module will eventually bring a crash but was able to have a starburst a few times without the crash.
I have generated a report of the last crash and will include it if this can help.
Will continue to experiment and see if I can figure out the best explanation for the behaviour.
This has been very unusual for Terragen and had experimented previously with these modules with no problems but there has been an update since.....is it possible that this is a new issue with the last version
Thanks for looking into this !