If you have a small number of files, the official Free Edition of Allway Sync might be enough for your needs. Open Source Alternatives:
Most "cracks" or "activators" are bundled with Trojans. Once executed, they can steal your passwords, encrypt your files for ransom, or turn your computer into a botnet node.
Version 19.1.5 was a stable release known for its improved engine performance and better handling of cloud metadata. While it is an older version, many "warez" sites still host it because it was one of the last versions before significant changes to the licensing engine were implemented. Better Alternatives to Cracking