Rewind 0.2.5

Rewind 0.2.5 fixes the Windows portable update installer and checks that the required NBA 2K19 installation files are present before either online or offline play.

• The hidden updater now survives the old launcher's exit, replaces the portable executable, and restarts Rewind. Failed installations preserve the existing launcher and save bounded diagnostics.
• Missing game installation files show "Game update required" and block both play options.
• Game installation checks no longer require a specific executable SHA-256. Rewind still checks the game layout before loading its client module.
• Your signed-in Steam account, launcher admission, and existing save protections remain required.

For 0.2.3 and 0.2.4: download this portable launcher manually and replace your previous Rewind executable while the game and launcher are closed. Their existing installer cannot install this repair automatically. Later updates use the repaired installer.

This release contains only the portable launcher update, with its embedded Rewind client and required notices. Game files and server packages are not public release assets.

Verified with launcher tests, isolated native checks, dummy Windows update installation and rollback, hidden packaged UI checks, and a production package audit. In-game startup and the live VPS require manual testing.