Downloaded today from http://www.myplugwise.com
Fortunately the installation created a system-restore point which, for the first time in my life, helped me.
After the system-restore I only had to copy the old database .mdb and the old release is now running again..
(I backup the plugwise database .mdb every day
![Wink ;-)](./images/smilies/icon_wink.gif)
Still would love to know why this happened and if it can be fixed. (even though I'm not to sure if I need to upgrade reading through some of forum messages)