If you previously purchased a Pro license, it should still work with the installed 21.1.5 version, but new keys are generally no longer sold directly. Safety Warning for "Activation Keys"
The developers, Siber Systems Inc., now encourage users to migrate to GoodSync.
Searching for "Allway Sync Pro 21.1.5 activation keys" on third-party sites is highly likely to lead to scams or malware. As of , Allway Sync
Keys sold by unauthorized third parties are frequently stolen or part of "volume licenses" that Microsoft or software developers can revoke at any time. GoodSync for Allway Sync users