Downloading a TMX File
Transifex allows you to export the TMX file for a project and use it with an offline translation tool.
To export a TMX file:
Pick the project you want to edit from the project navigation in the Dashboard.
Click on Languages.
Click the Get TMX icon .
In the popup you can select the language and the option to include untranslated strings to be included.
Click Download to get your TMX file.
Alternatively, you can also download a your TMX from the Workflow tab of your project settings
And if you worked offline and used a TM tool, you can upload the updated TMX file to your project.