Not quite. The law is that the secretary cannot allow someone onto the primary ballot who is, in their opinion, disqualified. The ruling is that CO has the right to use that law to keep Trump off of the primary ballot.
I don’t know whether that law also applies to the general election ballot, but the fact that the republicans think that they can pull it out of the state’s hands and do a run around with a caucus makes me think it’s about the primaries. I don’t think they can legally switch to a caucus mid race for other reasons, but if they do they think it’s a path.