If you purchased a perpetual license of ArtCAM 2018 before the discontinuation, you can still download the official installer from your Autodesk Account (under "All Products & Services"). Autodesk still hosts these files for paying customers.
Most "ArtCAM 2019" downloads found on third-party sites or forums are often: Renamed versions of ArtCAM 2018. Illegal "cracked" software that may contain malware. Legacy installers FULL ArtCAM 2019 Download
: The development team that worked on ArtCAM moved to a new company called , which is the official replacement for ArtCAM users. Existing Licenses If you purchased a perpetual license of ArtCAM
