This option is available until 6.1, but does not appear to be available in 6.2.However, I've checked the Release Notes and can find nothing about it being removed/deprecated.We will open an internal issue for this to be clarified and confirmed.

Have you seen the definition of Exclude List under:Creating a Launcher ConfigurationThere is also an example which might be of help.

You can also look at the documentation:Add New Selection Category to Asset BrowserWhich references the github sample:https://github.com/Adobe-Marketing-Cloud/aem-authoring-extension-assetfinder-flickr

Which version of AEM/CQ are you using?Once we know that we can provide you with the link to the appropriate version of the documentation.

New information about extending Content Fragments has been published (and existing content updated). See:https://docs.adobe.com/docs/en/aem/6-2/develop/extending/content-fragments.htmlhttps://docs.adobe.com/docs/en/aem/6-2/develop/templates/content-fragment-templates.htmlhttps://docs.adobe.com/docs/...

Just to check - is branch 2 still showing as the Default Route on a new instance of your workflow?And which version of AEM are you using?

The technical requirements are listed under:https://docs.adobe.com/docs/en/aem/6-2/deploy/technical-requirements.html

Did Tuhin's reply/link solve your issue? Please let us know if so, otherwise feel free to ask more questions.Thanks.

This topic is covered in the documentation:Selecting your UIIt might be worth checking the UI Overrides for the Editor.

See details under (and surrounding):CQ MSM Content Update Action - Exclusions