If you only need time billing without client lock, even a shared spreadsheet + manual timer can work for tiny cafés.
Start, pause, or end both paid and free sessions across all machines in real-time.
Unlike newer versions, 2.2.5 does not phone home, making it usable in isolated networks.
Assuming you have a clean, legitimate copy, here is the canonical installation process:
A: No, it was commercial software. Many “free downloads” are either time-limited trials or cracked versions. Using cracked software is illegal and unsafe.