In some cases WinSW users may want to update WinSW to a higher version, but now it is complicated, because Windiws Agent Installer may downgrade the agent using its "automatic upgrade procedure" (just by checksum).

Proposal:

• Add a system property, which disables automatic upgrade
• Add version check. WinSW follows the semver approach, hence it should be possible to check if the version is newer && compatible, hence it is possible to determine when the upgrade is safe and when it is required