Be aware that Lumion stores your Library and Projects in your Documents folder. Each version will create its own sub-folder (e.g., Lumion 10.0 and Lumion 11.0 ), ensuring your assets don't get mixed up. Conclusion
A “verified” older version of Lumion means: lumion older version verified
For older versions, Lumion often provided full offline installers (which are massive, 15GB+). Verified offline installers are preferable because they do not require the web installer to fetch unchecked files from a CDN. Be aware that Lumion stores your Library and