535U is the latest version reported in the 'About ObjectDock' screen. At this time the Stardock servers are being worked on as indicated at the top of the forum page screen.
"The Stardock root database server had a hardware crash on Christmas eve. The DB admins are working on restoring it but some services will be affected including customer database updating, software updating and downloading and other services. We do not currently have an ETA to solve due to limited personnel being available on Christmas eve / Christmas day but it should be rectified within the next 48 hours."
When this is resolved you will be able to check for any updates to ObjectDock Plus in Impulse.
Thank you for your patience.