InstrumentStudio is available online for download. It also installs with many NI modular instrument drivers, such as NI-SCOPE, NI-FGEN, and others, so you may already have a version of InstrumentStudio installed on your PXI controller.
InstrumentStudio is companion software for NI PXI instruments and requires the appropriate drivers to interact with those instruments. Ensure you have the appropriate drivers installed on your system to use their associated panels in InstrumentStudio.
InstrumentStudio Professional enables you to build custom measurement logic, using I/O from multiple instruments and out-of-the-box user interfaces in LabVIEW or Python. The SDK and example repos install build tools for the appropriate software tools and guide you through the process of building your first plug-in.