I want to add an offline deliverable to a closed project, but I can't see an option to do that anywhere.
To add files to a closed project you need to change the project status. In XTRF project becomes closed automatically when all process steps are in the Ready od Canceled status.
the simplest way to reopen the project is to change the status of one of the steps (for example the last step in the process) back to start, add the files add then change the step status to Ready.
You can do similar if the step is canceled, you can change it to Opened and then back to Canceled again.
Customer support service by UserEcho