Upgrading the extension across TYPO3 and PHP version upgrades

Important things to do when upgrading from seminars 3.x to 4.x

The TypoScript template files have been renamed from *.txt to *.typoscript. If you are directly referencing any of these files, you will need to upgrade your references.

All PHP classes are now namespaced. If you are using any XCLASSes, you will need to update those accordingly.

The hook interfaces have been updated to use namespaced classes, and some deprecated hooks have been removed. If you are using any hooks, please update you hook classes.

All images and attachments have been migrated to FAL. Please run the seminars upgrade wizards to automatically update you data.

The feature for uploading images and attachments in the FE editor has been removed. If you are using a custom HTML template for the FE editor, you will need to remove the corresponding subparts.