Modern renderers like V-Ray or Thea Render will NOT work with the portable version because they require registry entries.

Since the official SketchUp site only hosts the last two major versions, you have to use reputable third-party archives to find the installer. Note that these are typically , not pre-made "portable" versions:

: Modern versions include 10GB of cloud storage and access to the 3D Warehouse , which may not function correctly in version 8. Recommended Workflow for Paper/Project Use

But before you click that download button, here is everything you need to know.

These application virtualization tools capture an installation and repackage it as a single executable. This is complex for beginners.