EndNote 21 is compatible with desktop libraries created in EndNote X9.3 and later versions. You can open and use those libraries in EndNote 21 seamlessly.
However, to use libraries created with EndNote X9.2 or earlier versions in EndNote 21, you will need to convert them to the EndNote X9.3 or later format first. See the steps below:
This method allows you to create a new compatible library while leaving the original library unchanged. For more details about compatibility issue, please refer to this page.
Activate CWYW Add-in in Word
If the EndNote tab is still missing after these steps, please try:
More information from EndNote Official Support
You may try the Import function in EndNote:
You can find other citation styles from the EndNote Library
With this, the newly added citation style should now appear in the pull-down menu in MS Word.
Please note that the tags feature is only available in the EndNote 21 desktop version and it is not supported in EndNote Web / Online Classic interface.
You can find more information about organizing your references by tags in the EndNote 21 desktop here.
Please note that EndNote Web for EndNote 21 does not support the sharing function for a group of references. However, you can still retrieve the shared references through EndNote Online Classic by following the provided instructions during the sharing process.