Hi Isthmus,
Thank you for your interest in Essential PDF.
4.4.0.51 is our latest version with many new features and fixes. You can look into our release notes for the features and fixes that are included in our latest version.
Release Notes:
http://www.syncfusion.com/support/releasenotes/default.aspx
You can find the evaluation version for download at following url:
http://www.syncfusion.com/downloads/latestversion/default.aspx
There wont be any compatibilty problem. Also, you can have multiple version in your machine and can get back to any version that you are in need.
Could you please contact sales team[
[email protected]] for further queries?
Thanks,
Dhivya.