Halion 7 Macro Page Designer UI Development for instruments

I have a question: Is Halion 7 stable now In this version when it comes to creating the UI for your instrument in the Macro page designer, importing your own graphics, knobs & sliders, etc. This was and still is frustrating when doing the above in Halion 6 as it keeps crashing out. If anyone knows a fix for this. I would love to hear from you. Thanks