CT Pro beta 20 left me twisting in the wind today. 
Looking for beta 21 - pleeeeeeeeeeeeeeeeeez!
We are working on getting a new beta up onto our website as soon as possible. When it’s ready, beta 21 will be listed in the downloads section of our website:
https://www.chromix.com/colorthink/download
In the meantime, you can use the existing beta by merely changing the date on your computer to a date before December 30, 2008, then launching beta 20 as normal.
Note that you only need to roll back the date for starting the program. Once ColorThink is running, you can set your computer back to the true date and continue to use ColorThink.
We were hoping this last beta would be the last one we would need before releasing the next version, but we found there are just a few lingering issues that are taking longer than we thought to resolve.
I’m sorry for the inconvenience, and know that we will take care of this as soon as we can.
It’s ready!
Beta 21 for Mac:
http://www2.chromix.com/ColorThink/download/pro/beta/ColorThinkPro301b21Mac.zip?
Beta 21 for Windows:
http://www2.chromix.com/ColorThink/download/pro/beta/ColorThinkPro301b21Win.zip?
Thanksssssssssssssssssssssssssss! 