This information is stored in the database.
If you cannot run a reinstall of this Process Automation server and resolve the issue, then I would suggest installing a new Process Automation. Once that is up and running, you can take a backup of the original database and import that to the new database. There are a couple other steps that you need to take in order to be able to access this new temporary setup outlined here in this KB Article:
How do I configure a new PAM Orchestrator instance - CA Knowledge
This should allow you to export your library.