Smarter Update Handling for Multiple or Portable LaunchBox Installs

📋 Summary

Modernize the LaunchBox update process to better support users with multiple or portable installations. This includes detecting existing update files to avoid redundant downloads and allowing the installer to target and update portable setups.

🎯 Feature Overview

• Shared Update File Support:

  If an update file already exists in a designated Updates folder, LaunchBox should verify (via size/hash) and use it—saving bandwidth and storage when managing multiple installs.

• Portable Install Update Support:

  Enhance the installer to:

  • Detect nearby portable installations automatically.

  • Allow users to manually select a portable LaunchBox directory to update.

  • Offer the same seamless update experience as standard installs.

📦 Benefits

• Saves time and bandwidth for users with multiple installs.

• Reduces redundant downloads and SSD wear.

• Simplifies maintenance for users with both installed and portable setups.

• Makes LaunchBox more flexible in varied deployment scenarios (e.g. cabinets, multi-user setups, dev/test environments).