Hi LearningAsIGo ,
Thanks for your post.
There's no reason for ATUM-free to not work in parallel with MYWorks. At least as long as you don't work with ATUM Multi-Inventory nor Product Levels you shouldn't have problems.
However, we can't ensure that. You should check if it works for you. FYI, here is a list of the plugins we ensure we are compatible with.
Best Regards,
José Andrés