Development and distribution of JCE 1.5 will be discontinued on 31st October. From 1st November only JCE 2.0 and associated add-ons will be available for download.
Subscribers will still be able to download JCE 1.5 add-ons from their subscription page.
All existing JCE 1.5 users are urged to upgrade to JCE 2.0. JCE 2.0 is compatible with Joomla! 1.5 and Joomla! 1.7
Installation instructions are available here