Before updating, note the current subscription groups, routing mode, system proxy method, and automatic update interval. Updates normally retain existing settings, but menus and defaults may change across several versions. After updating, verify subscription refreshes, node selection, system proxy status, and any configuration parsing errors in the logs.
If the new version behaves unexpectedly after launch, close other proxy clients and restart the current program, then check configuration-directory permissions and subscription format. Do not change the client, node, routing mode, and subscription URL in the same troubleshooting pass, or it will be difficult to identify the cause.