Here's a story tailored to the filename "Lumion-2024-4-2-Download.cache":
When downloading the 4.2 installer directly in Chrome, Firefox, or Edge, the browser may initially save the file with a .cache or .crdownload extension before renaming it to the final .exe or .msi installer. If the download fails, the browser leaves the .cache file behind. Lumion-2024-4-2-Download.cache