ProRes output is not available natively on any Windows system, with the exception of Telestream Episode and a few other non-official programs like FFMPEG and FFMBC. I would consider exporting out a DPX frame sequence as FFMPEG/FFMBC and their associated programs have a learning curve, in case you need to deal with something immediately.
AJA is simply a company,10 bit Lin RGB is one of their many uncompressed codecs. RGB, by design is always 4:4:4. Uncompressed YUV is usually subsampled to 4:22 or 4:2:0