How can I convert nRF51 USB reference design Altium files to Circuitmaker?

[Bill]

I thought I would copy the antenna design and then do modification for a toy I am trying to make.

[MartinBL]

I found this info on the CircuitMaker [FAQ pages](documentation.circuitmaker.com/.../CircuitMaker - ((FAQs)):

What support is available for importing from other design tools?

CircuitMaker facilitates streamlined migration of designs created in other tools, with importers for:

Altium Legacy PCB files (v3.0 and v4.0)

and

Can I open my designs from other Altium products?

CircuitMaker can open Altium Schematic documents (*.SchDoc). You are therefore able to add existing documents of this kind to your CircuitMaker projects, irrespective of the product in which those schematics have been created (Altium Designer, PCBWorks, or CircuitStudio).

Warning: Note that CircuitMaker has its own PCB file format (*.CMPcbDoc). As such, the PCB documents created in other Altium products cannot be opened in CircuitMaker.

I couldn't find any information about any converters or importers that would convert CircuitMaker to Altium PCBs.