There seems to be a problem with Adrive. The whole Adrive site is unavailable (probably since yesterday). So links to Adrive are not working.
I can only hope that this is a temporary matter.
On the bright side: this coincides with a hard disk failure on my computer. I hope to get this right by tomorrow (or Thursday at the latest).
EDIT (a few hours later): The problem appears to have been solved (at least the one with Adrive...).