Captain Kill Switch 0.4.3 ڈاؤن لوڈ

Fixes a Windows auto-update retry loop. A machine that failed to apply an
update could relaunch, report the update as installed, come back on the old
version and repeat every few seconds.
- The automatic check no longer retries the same target version within an
hour, and reports the failure instead of a false success.
- Manual update checks are never affected.
- No change to tray behavior, kill behavior, exclusions or the two-second
force floor.