It’s very much a general problem. I had that issue both with the Carenado C182 and with some of the World Update content. I have to delete the old completely before installing the new, or else I get caught in a download loop.It’s the same issue as the download / decompression loop people get stuck in while doing the main sim updates.
This is not a CRJ specific problem. This is an issue with the update system Asobo have built into the sim. But like most problems with the sim, they don’t seem to affect everyone.