Release v0.6.63: automatic LAN transport fallback and connection help

Release/README.md

@@ -1,11 +1,16 @@
 # Latest Windows release
 
-## v0.6.62 — 2026-11-10
+## v0.6.63 — 2026-11-10
 
-In **Settings → Languages → Languages for applications...**, drag **⊕ Drag to window** onto an open window. A frame follows the window under the crosshair. Release to select the program in the list, or press **Esc** to cancel. If the program is missing from the list, KSwitcher adds it for selection. Pending edits for other applications are preserved.
+LAN input now automatically tries direct TCP, reverse TCP after 1.5 seconds, and encrypted UDP over the discovery socket after 5 seconds without an authenticated TCP connection. A working UDP session remains on UDP until disconnected. Update KSwitcher on both PCs through the tray **Update** command to enable all fallback methods; keep each PC's own data directory.
 
-Choose the program's allowed layouts, then **Use languages** and **Save**. Application profiles apply to the executable, including all browser tabs in that executable. Contact profiles still take priority.
+UDP input uses fresh authenticated sessions, ordered commands, acknowledgements and bounded retries. Lost, reordered or duplicated packets do not duplicate key presses. Loss of authenticated traffic or acknowledgement progress closes the session and restores local control.
 
+After 15 seconds without a connection, **Connection help** explains what to check and provides copyable administrator PowerShell commands for the actual running KSwitcher executable on that PC. Rules allow inbound LAN traffic only from the local subnet; commands are never executed automatically. A timeout alone is not presented as proof of a firewall block.
+
+Pairing now shows the target and remaining wait time, retains the code until pairing succeeds, and explicitly explains automatic saving independently of the main Settings **Save** button. Connection failures remain visible during retries.
+
+Validated with 227 LAN input checks, 43 discovery/pairing checks and 863 UI/settings checks. Fallback tests cover unavailable TCP directions, encrypted UDP, loss, reordering, duplicate/replay protection, tampering and reconnects. The new fallback implementation has not yet been tested between two physical PCs.
 
 ## Upgrade