We have two options under Tools Menu for merging libraries. Choose the appropriate option depending on the library you are trying to merge:
You can merge Component Libraries from the older version of LEAP component products using the option Merge Component Libraries. Click on the Folder icon in from of the respective option to select the component library. You have option to Merge or Overwrite when reading the files.
To merge a consolidated library choose the option to Merge Consolidated Library and proceed to select the library that one needs to merge with the default selected library: