Can you show the patch, so that any problem on blender2crystal can be corrected to work with installed CS if need be ?
There's a bugtracker for blender2crystal (not crystal2blender, btw

) at
https://b2cs.delcorp.org/dev/timelineThat would be the best place to create a bug ticket and submit your patch. If you do so, please post the URL of the ticket here.
Thanks