There is no legal, free, portable version with a working license key.
Any website offering a “keygen,” “patch,” or “pre-activated portable exe” is almost certainly:

I’ve seen multiple reports of people losing project files or getting their Windows infected after downloading “SPDSXEditor portable + key.”

If you’re a student, hobbyist, or small business, politely email the company. Many will give a discount or even a free NFR (not for resale) license for testing.

The SPDSx Editor, often simply referred to in the context of its more popular or related software, is a tool used for editing and managing data or documents in specific formats. While my current information might not directly reference a widely known tool by this exact name, I'll provide an overview that could apply to similar software solutions.

SPDSXEditor is a specialized tool used for editing SPDSX files — typically related to industrial automation, CNC machines, or specialized database formats. It’s not a mainstream consumer app, which is why legitimate licenses can be expensive and hard to find.

There is no direct open-source clone of SPDSXEditor, but depending on the file format, generic hex editors (HxD) or XML/JSON editors might work.