Just use the updater to get this update. Please note that this overwrites the aircraft.cfg so you need to safe your liveries
HISTORY
1.2.0.0 online release
Please note the 1.2 version number is used to align with the A318/A319.
1.2.0.1 Experimental
Fixed webconnect not working for users who did not have the A318/A319 installed
Inserted the lower volume sound for wind and wipers as was used for the A318/A319
Corrected parking codes in aircraft.cfg
There have been reports of a throttle issue with the Airbus, which testers confirmed. However, since it's a Saturday afternoon, the devs and Mathijs are unfortunately not available to provide a quick fix. Therefore I disabled the 1.2.1.1 update for both, the A318/A319 and the A320/A321 products on the update server for now.
If you already updated, the only way to revert to the previous version is to uninstall the product and then reinstall the last download from your shop account.