You can import Translation Memory into an existing project through the Project TM tab.
To import a translation memory profile:
Reference: Project TM Search and Sort
The Import Translation Memory dialog box appears.
The file formats supported for import are:
WF Classic TM: The format supported by Wordfast Classic and Wordfast Pro 3.
TMX: The standard format supported by all translation tools.
The Create Translation Memory dialog box returns with all fields populated.
The new TM is created in the specified folder.