You may have figured out already, but still, in case someone else have the same question.
You only need to replace the content in the directory containing bigbluebuttonbn with the code of the version you want to install.
What I normally do in those cases is to rename the current directory as .bigbluebuttonbn, so Moodle ignores its content, and then unzip the new version in a new bigbluebuttonbn directory. And simply go to notifications and Moodle will do the rest.
Also, don't jump from a super old version to the newest one. It is better to do the updates incrementally if there are too many versions in between.
JF
You only need to replace the content in the directory containing bigbluebuttonbn with the code of the version you want to install.
What I normally do in those cases is to rename the current directory as .bigbluebuttonbn, so Moodle ignores its content, and then unzip the new version in a new bigbluebuttonbn directory. And simply go to notifications and Moodle will do the rest.
Also, don't jump from a super old version to the newest one. It is better to do the updates incrementally if there are too many versions in between.
JF