Websites promising "free activation keys" or "cracked" versions of Allway Sync Pro 21.1.5 often distribute:
Downloads from unofficial sources may contain viruses that compromise your data security. Siber Systems Inc.
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 Siber Systems Inc.
The developers, Siber Systems Inc., now encourage users to migrate to GoodSync. Siber Systems Inc.
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"