Due to continual spamming, forum registrations are now by Invitation Only. Hopefully this will be only a temporary measure to combat spammers.
If you want an invitation contact forumapplication @ camstudio . org
Sorry for the inconvenience.
Default directory for recording
I noticed the default option for "Directory for recording" was the install directory. On computers with higher security settings all users doesn't have write access to this folder. I think you should have the temp-folder option as default. If not, then at least add a tip in the FAQ to change to this option if the save file-dialogue doesn't show up.