Newer firmware versions for the Archer C5 v4 may support auto-updates:
If your settings were wiped during the process, go back to > Backup & Restore , click Browse under the Restore section, select your backup file, and hit Restore . Troubleshooting Common Upgrade Issues tp-link archer c5 v4 firmware upgrade
Q: Can I downgrade the firmware to a previous version? A: It is not recommended to downgrade the firmware to a previous version, as it may cause compatibility issues and security vulnerabilities. Newer firmware versions for the Archer C5 v4