Use a tool like 7-Zip or WinRAR to extract the game folder to your desktop.
If you played v0.2, look for the "Saves" folder in your old directory and copy it to the new v0.3 folder to continue your progress. Conclusion Slice of Venture Remake -v0.3- -Game Download-
Most updates are hosted on platforms like Itch.io or GameJolt under the official project name. Use a tool like 7-Zip or WinRAR to