No - STL-Files are Mesh-Files and editing mesh-files is usually done in sculpting-software, not in (proficient) CAD-software. You asked for editing STL-files and this is not possible in a solid-modeller. One may try to convert the STL into a Solid, but conversion always comes with a price: you loose accuracy in shape, because of the approximation. It is technically possible, but not easy to implement, what makes this feature pretty expensive. The team deciding to work on this feature, means several other features won’t come that the community is waiting for.
So, instead of complaining about this feature not being there, show me your application and I may look into a workaround for you. Like I said before: boolean-operations with STL-files are possible in Shapr!
Best Regard
Matt