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The version can be found either using an Admin account and navigating to: Dashboard -> Site administration -> Plugins -> Plugins overview -> BigBlueButtonBN Or editing the file version.php directly in the plugin directory: $plugin->version = 9999999999; So, let’s assume we have versions: My old BBB plugins on Moodle 3.0.9:
  1. mod_bigbluebuttonbn version 2015062101
The new BBB plugins that I wanted to use on Moodle 3.0.9:
  1. mod_bigbluebuttonbn version 2016051919
Pre-installation steps: a) I have the code in a git repository so if I need to, I can checkout the folders and revert the file changes. b) It is important to keep a back up of the tables that the plugins use. From their “db/install.xml”, there are two tables:
   b.1) bigbluebuttonbn and bigbluebuttonbn_log for bigbluebuttonbn c) I exported the tables one by one: c.1)   mysqldump -u MYUSERNAME -p MYDATABASE mdl_bigbluebuttonbn > /tmp/moodlelive_bigbluebuttonbn_table.sql
c.2)   mysqldump -u MYUSERNAME -p MYDATABASE mdl_bigbluebuttonbn_log > /tmp/moodlelive_bigbluebuttonbnlog_table.sql Upgrade steps: a) rm -rf mod/bigbluebuttonbn c) Then, I  ‘wget’ and ‘unzip’ the zip files from the Moodle plugin directory, in my mod folder. d) From the front-end, I followed the steps and upgraded the plugins. Let’s suppose that I am not happy with the new plugins; something does not work and I want to downgrade. At this stage, if I have created new meetings, they will be lost, if I apply the following steps, so please make sure that you only want to downgrade without migrating any “new” data. Downgrade steps: a) rm -rf mod/bigbluebuttonbn b) git checkout — mod/bigbluebuttonbn At the moment, I have got the old plugin files that were stored in my GIT repository. c) A table in the database keeps the new versions of the plugins that I installed. I must update these values otherwise Moodle will never use the older plugins versions and I will not be able to downgrade! c.1) ID for mod_bigbluebuttonbn: select * from mdl_config_plugins where plugin = ‘mod_bigbluebuttonbn’; c.3) update mdl_config_plugins set value = ‘2015062101’ where id = THE_ID_FROM e.1; c.4) update mdl_config_plugins set value = ‘2014070401’ where id = THE_ID_FROM e.2; d) So, up until now we have put in place the older versions in the database and we need to import the backups: d.1) mysql -u MYUSERNAME -p MYDATABASE < /tmp/moodlelive_bigbluebuttonbn_table.sql d.2) mysql -u MYUSERNAME -p MYDATABASE < /tmp/moodlelive_bigbluebuttonbnlog_table.sql Refreshing the front-end will prompt you to update the database. Click on the button and then check if you can use the plugins - perhaps you will need to update the server and the URL of BBB server on the appropriate screen.