The official Edius user forum has a dedicated "Effects Sharing" section. Experienced users upload .tpd files for free. Since the community uses these daily, they are guaranteed to work.
The smartest way to ensure "edius transition effects free download work" is to stop downloading and start creating. EDIUS has a built-in "Transition Creator."
Right-click the ZIP file > Properties. If you see a "Security: This file came from another computer" message, check the "Unblock" box. If you skip this, Edius may freeze when scanning the transitions.
Now you have a custom transition that will always work because you built it inside your specific version of EDIUS.