Upgrading Breezingforms from very early versions is not possible on a native way.  Please note that we strongly recommend to use a fresh install of Breezingforms 1.8.5.  

The only disadvantage of a fresh install would be that you will loose your existing records. But if you need your records please backup your complete Joomla site / database and test this process on a local server first!

To upgrade to BreezingForms 1.7.5 from BreezingForms 1.7.1 Build 730 through Version 1.7.3, unzip the upgrade file and then follow the instructions as noted below.

1. IMPORTANT!!! Save and backup your Joomla installation files and database before upgrading!
2. If you have any custom QuickMode themes, PDF templates, Email templates or any other custom resources, copy them from your server to your hard drive using your FTP client.
3. Using an FTP client, copy the contents of the folder /component-files/administrator/ to you Joomla's /administrator/ directory.
4. Using an FTP client, copy the contents of the folder /component-files/components/ to your Joomla's /components/ directory.
5. Using an FTP client, copy the contents of the folder /component-files/language/ to your Joomla's /language/ directory.
6. Using an FTP client, copy back to the server all of your custom QuickMode themes, PDF templates, Email templates or any other custom resources that you saved in Step 2 above.
7. (Re-)install the plugin and module if you are using them.
8. In some cases you will need to re-assign the validations and actions in your forms. So check your form validations right after the upgrade to make sure they're okay.

That's it, you're all done!