I needed to add categories to existing products but when I did that using the "On the fly category creator/importer v0.2.5" it reset existing categories with categories I tried to append.
I know I can export products via Dataflow Profiles and then append new category ID's to existing ID's but I'd rather not when I have to update many products with different attributes and also have to check so many category ID's. Is there a feature to prevent category reset?