: Legacy versions typically require a physical USB or parallel port dongle. Drivers for these older security keys (like HASP) often fail on 64-bit systems.

: While version 7.5 supports many older plotters, it does not include drivers for modern equipment released after its lifecycle. The Risks of "Free Download" Sites

Understanding FlexiSIGN-PRO 7.5: Features, Compatibility, and Modern Alternatives

: Unofficial "setups" often lack the crucial Production Manager or dongle drivers required to actually send jobs to a cutter. Flexi System Requirements - SAi Software Support

If you are attempting to set up FlexiSIGN-PRO 7.5 on modern hardware, you will likely encounter several hurdles: