The old version 3.3.7 need to update to 4.1.1 for this changelog :
- Included a jlinked version of openjdk 11 in the installations bundles and zip packages.
- Upgraded PDF engine to latest version.
- Added a way to clear recent workspaces.
- Smarter destination for Save Workspace.
Link: https://github.com/torakiki/pdfsam/releases/download/v4.1.1/pdfsam-4.1.1-linux.zip