Public Betas of WebIS Desktop Sync (WDS) contain hard expiration dates which cause expiration no matter if the application has been paid for or not. We will always provide new releases of WDS which will extend or at some point remove the expiration date.
The reason for the expiration date is that we are not requiring any purchase of WDS at this time because its beta. So instead of a 2 week trial or what not, it just has a hard expiration date. When the software is fully released, the expiration will be removed.
Please check the Public Beta forum for download information:
http://www.pocketinformant.com/Forums/index.php?showforum=65