There is no “Pro” or “Premium” version of the VSX 26 software. Version 1.5 is the final release. Peavey discontinued the VSX 26 around 2016, but the software remains freeware.
Peavey support still answers emails about the VSX 26 – yes, even for an older unit. peavey vsx 26 software 15 free
Peavey VSX 26: How to Get & Install the Software + Preset 15 (Free Guide) There is no “Pro” or “Premium” version of
Insert the USB stick when prompted and follow the on-screen instructions. 10-15 seconds for the unit to recognize the drive. Critical Compatibility Note Software for the newer "e" model (like VSX Editor Software 1.0 ) is generally not compatible with the original VSX 26. Hardware Limits: peavey vsx 26 software 15 free