If you are upgrading from v0.4 to v0.5, check the developer's notes. Usually, you can copy your save folder from the old version's directory to the new one to keep your progress.
Most indie games or fan projects with specific version numbers (like v0.5) are hosted on developer-specific platforms rather than major stores like Steam. The Breaker v0.5 [Corrupt King] Download for Wi...
Many creators host versioned releases on Itch.io , where you can often find a "Download for Windows" button. If you are upgrading from v0