I got a similar thing, though it didn’t ask to quit/reload, it gave me "error loading bpatcher". Also earlier, it gave me the warning that my bpatch isn’t in the search path, though it loaded OK. Then when I changed the argument, it gave me the error-loading message.
I put them into the search path by adding my folder in File Preferences, and the argument problem was solved—change them in the Inspector, they update right away.
will re-check, but I am pretty sure my b-patchers are in the search-path (they all are in a folder "BPatchers" which is in the search path)
will re-check, but it happens so far with all my max5-native (so to speak) b-patchers, not with the max4-native, never saved as max-5, but still used in max5