Downloads
Version 1.6 download (see install instructions)
This is the complete install, for upgrades, see below.
What's new in version 1.6
- Big changes in the initialization of the Mango and the general settings, which are no longer in the configuration file
- Updated the facade to be easier to use in multi-site installs
- Added permission for profile management
- Added permissions for comment management
- Added new system plugin to help manage assets such as creating automatic thumbnails using a URL
- Added output for archives to show current page number and total number of pages
- Added ifHasDescription to AuthorProperty.
- Added currentCount to PodProperty tag
- Added ifNotHasPicture to author tag
- Fixed issue with IE not showing the directories in the file explorer
- Added setup directory removal after setup is complete. Written by Adam Tuttle
- Fixed problems in Atom feeds when blog was installed in root
- Added a table to fix layout issue in post form
- Added attribute ifCustomFieldEQ to PostProperty
- Transfered some "if" tests from PostProperty tag to Post tag
- Added getting posts with a custom field or custom field value.
- Added some "if" tests to Category tag
- Hide Cache if user can't "manage_system"
- Bug fixes to API
- Fixed issue with RevisionManager plugin in Railo
- Added Blogger import. Written by Alan Rother
Upgrade download
From version 1.2.2 and above
Go to your blog administrator and you should see a button to let you run the automatic upgrade.
If for some reason you can't run the automatic updater and you are in version 1.3.1, you can download the update, unzip it and follow the instructions in the readme.txt file.
IMPORTANT
If you installed version 1.4.1, you will need to make sure your role has the "Manage system" permission. If you don't, you will not be able to download the update. Go to Users > Roles, and click on your role. The select the "Manage System" checkbox and click Submit. The logout and log back in.

It could be that your server is blocking web service calls. Do you know of any limitation like that in your server?
Regards,
Phil
You can import it while you are installing Mango.