How to delete Custom Attribute Presets in Max2018?

[ViperAleks]

I have created Custom Attributes via Parameter Editor in Max2018. And even option 'Add Presets Options' was unchecked Custom Attribute Presets rollout have been added underneath of the created Custom Attributes. I cannot delete this Presets rollout. Now, when I export this file to Max2016 which doesn't have Custom Attributes Presets feature I get error about missing Dll with Class: Custom_Attributes_Presets. How can I fix it?

[JamesClarke3D]

I just ran into the same problem in 2019 and was able to dig into maxScript to find the appropriate code to remove that. Of coure you have to have the object selected, and this is assuming you don't have any other custom attributes added to the object, since it's deleting the first one. 

custattributes.delete $ 1 

Other relevant functions for managing these are here: https://help.autodesk.com/view/3DSMAX/2016/ENU/?guid=__files_GUID_0A1E08F8_A8C5_4737_AA6F_39194AD165...