Where have you been looking? I have just checked the links; they are correct, and lead to the link (https://filehorst.de/d/dvqfFnCe) for "RijndamRail Update_20200104.zip".
By the way, the next update, containing the CC72000 locomotive, is now in the testing phase.
EDIT: Found the problem; http://sim.bemined.nl/wiki/Add-on_Version_History ..... I did not make that page, so whoever placed that link (and incorrect release date), made an error. I just corrected it
CEO of the Rijndam Electrical Transport company