A standard NC Studio 5.4.49 installation package is small, usually ranging between 2 MB and 5 MB. Avoid any "download packages" that are suspiciously large (e.g., 50MB+), as they likely contain bundled adware or malware.
Recommendations for if you want to move away from PCI cards.
: Robust support for X, Y, and Z axes for milling and engraving. G-Code Compatibility