Can I save somehow all my templates and workspaces, if I want to reinstall the platform?

Yes, you can. You just need to save folders with your data. All these folders are located on the disc C, folder My documents (!not in Program Files)

1. Chart templates are located in: \Documents\ATAS\Chart\Templates

2. Snapshots: \Documents\ATAS\Chart\Snapshots\

3. Work spaces: \Documents\ATAS\Workspaces\

4. DOM: \Documents\ATAS\SmartDOM\Templates\

5. Logs: \Documents\ATAS\Logs\