KingsRAM v1.1.7
KingsRAM v1.1.7 - Launch actually works
Launch "415 Unsupported Media Type" fix
Roblox began rejecting the authentication-ticket request with 415 Unsupported Media Type unless it is sent as JSON, so no account could get a game-join ticket - launches failed with "Invalid Authentication Ticket." The request now carries the correct JSON content type and body, so accounts can join games again. (v1.1.6 added the required Origin header, which was necessary but not sufficient - this is the missing piece.)
Accounts stay valid longer
Roblox now periodically re-issues your login cookie via Set-Cookie and eventually rejects the old value - the reason alts seemed to "go invalid" quickly. KingsRAM now picks up the refreshed cookie automatically each time you launch and saves it, guarded so a bad value can never sign you out.
Install: download RobloxAccountManager.zip, right-click -> Properties -> Unblock, extract, run Roblox Account Manager.exe. Existing installs auto-update.
Verify the download: the SHA-256 in RobloxAccountManager.zip.sha256 matches the zip.