I've had several questions about upgrading CDSEO when moving to x-cart 4.4.x and why they shouldn't use clean urls.
If you switch to clean urls in the upgrade you will likely have many broken links, you won't maintain your SEO data, and will lose much of your SEO rank. It's possible your site will fall off the SEO map for several months and possibly never reach the same SEO levels again in the future.
By upgrading with CDSEO you will ensure that you will have all the same urls so none of them become broken. You will also maintain your page titles, meta descriptions, and all information from CDSEO.
Further, the upgrade process is simple, and the upgrade cost for CDSEO is just $35.
The process is as follows:
1) Purchase the CDSEO upgrade for $35 from:
2) Install CDSEO on your new x-cart 4.4.x site.
http://www.websitecm.com/x-cart-mods/cdseo-pro-x-cart-seo-pro-upgrade.html
3) When upgrading to x-cart 4.4.x and upgrade your previous database to 4.4.x it will maintain the wcm_cdseo* tables when transferred to your 4.4.x site keeping all of your SEO information intact.
4) On your new x-cart 4.4.x site go to CDSEO Admin -> Modules -> Autopopulate and submit. This just clears the cache files.
Simple right? If you have any questions I'll be happy to answer them.