: Always create a full backup and export your configuration via System > Backup before attempting a downgrade.
MikroTik RouterOS 6.42.6 is a legacy software release (July 2018) for MikroTik networking devices. While newer versions like are current, users often seek this specific version for stable legacy environments or to resolve issues with later updates. Download Options MikroTik RouterOS 6.42.6 Free Download
: Go to System > Packages and click Downgrade . The router will reboot and apply the version. Licensing & Access Router OS v. 6.42.6 available? - General - MikroTik Forum : Always create a full backup and export
: The safest way to download legacy versions is through the official MikroTik Download Archive . MikroTik RouterOS 6.42.6 Free Download