Generally wise. Always cautious with external downloads.
That said, build 8528 seems indeed hosted on the geniatech website:
https://www.geniatech.eu/download/eyetv-4-0-0-8527-64-bit-mac-version/
(Go to the "Download eyetv 4 version 4.0.0 (8527)" link, right-click ,"Copy Link", and replace "8527" with "8528" in the UR, and voila...)