On re-run the installer was trying to overwrite locked files in an existing prefix, causing repeated Access Denied dialogs. Now check for Kyber.exe first and skip the installer entirely if it's found. Also kill any leftover Wine/Proton processes before a fresh install to avoid file-lock conflicts, and move Windows path resolution to after the installer/skip decision so it always runs regardless of path taken. Default fallback path updated to match Kyber's actual install location: C:\Program Files (x86)\KYBER Launcher\ Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01D8ckUJQtj1pH8jtAddBDZs