Upgrading from ionCube to Zend

[mltsy]

Is it possible to upgrade from the ionCube version to the Zend version without losing data? What files would I have to replace? Thanks!

[ve9gra]

Backup calendar.php, config.inc.php, licence.php and any other files you've modified manually (demo.php and themes... usually). And the database folder if you're using the flat-file database.

Then rename the calendar folder (as a backup) and use the auto-installer to install the Zend version instead. Then restore the files that you've specifically backed up.

Once you've confirmed that everything is ok, you can delete the folder you've renamed. That should be all.