I can't seem to get the Adobe plugin to automatically load. I'm running Vista Ultimate with Adobe Acrobat Professional 8.0 (trial version) and Reader 8.0.

Thanks for posting, currently the installer does not work on version 8 of Acrobat, which we will fix in the next release. As a manual fix you can copy this file:

C:\Program Files\Screen Calipers 4.0\Acrobat\Calipers.api

To here:

C:\Program Files\Adobe\Acrobat 8.0\Reader\plug_ins\Calipers.api

Then restart Acrobat and the toolbar will show up in Acrobat.

Thanks much. I'm really impressed with your tools.