You can export all your active and inactive private translation memories from the Translation Memory and Glossary tab.
From the home page, click on Settings and access your Translation Memory and Glossary tab. You can do the same from the translation editor page, by clicking on the settings icon in the top bar or on Add your personal TM below each active segment.
Once you access the Translation Memory and Glossary tab, click on the down arrow next to the Import TMX button corresponding to the private TM you want to export.
To export your translation memory, select the option Export TMX.
Enter your email address and click on Confirm. When the export is ready, an email will be sent to your email address with a link to download the translation memory.