I like the design, If it were my site though I'd just edit some small things like. The upload title bar I'm make the blue bit where it writes FileHost - File Storage... etc made easy! I'd make that smaller. But yea the rest looks good and the upload popup looks much better now than the previous version.
Is that for the sibsoft Xfilesharing script or the yabsoft script it looks like the 1st option,i have to say it does look good.
Oh yea noticed the writing went smaller, lol. But I ment make the blue bar where the writing is smaller, not the actual text. maybe match it to the blue menu bars size.