Just wondering if it’s possible to UN-chamfer an object after it’s been done. Like a “Live” chamfer that can be changed later, much like the drawing tools (Tangent, Horizontal/Vertical, etc).
Also, why do chamfers not remain the same size or sometimes not work/happen when I drag on an edge?
Currently there’s no option to delete chamfers in version 2.2.6 (this is the live version in the App Store).
But this is a new feature we will release in Shapr3D 3.0 this fall. So in a few weeks you can delete chamfers and fillets. 
This 3.0 release will also solve the problem with chamfer not working sometimes.
Awesome, thanks!