And there it was. A folder named "Voss_Lab_Tools." Inside, a single ISO file: Zeiss_Labscope_2.1_Win7_64bit.iso . The file timestamp was from 2014.
The progress bar crawled. 10%... 40%... 75%... Then a new window appeared. Not a progress bar, but a request: zeiss labscope for windows download
"Initialize Labscope? This will enable direct neural feedback calibration. Y/N" And there it was