You must have an PADS I/O Designer for FPGA license to open a project in PADS I/O Designer. Other license options include:
Allows you to simultaneously optimize multiple devices. Without a multi-chip license, you can work with only one device at a time when applying optimization scenarios in a Layout Database. For more information, see “Multi-chip PCB Optimization”.
Allows you to load a PADS layout in PADS I/O Designer.
Allows you to create a layout database in PADS I/O Designer.
When you perform an action that requires a license for which you have permission, PADS I/O Designer automatically requests the license and holds it until you close PADS I/O Designer. You can also select Setup > Licensing Options to manually request or release product license options at any time during your session.