Sorry for the difficulties. In case it's not too late, here are some steps for accessing our online Editor's image resize tool:
1. If you are already a member of Photoshop.com, sign in your account. You can access you account at either www.photoshop.com or http://www.photoshop.com/tools/organizer
2. If you are a member, and have not already uploaded your photo to you online account, please do so. Look for the 'Upload' button at the top right of the Photoshop Express Online Organizer (http://www.photoshop.com/tools/organizer). Select your image, and click the Edit button at the bottom of the Window.
If you are not a member, you can still access our online Editor at this URL: http://www.photoshop.com/tools?wf=editor Just go to this page and upload your photo to begin editing it.
3. Once you have your image open in the Online Editor, find the 'Resize' button on the left next to our other editing tools. Then choose the resize settings you like and click 'Save' when you're done.
There are a number of preset resize options; profile, mobile, email and website. And a custom resize. When selected you can then enter the resize in pixels in the W and H boxes. But you can only resize to the original aspect ratio.
So if you crop a photo to a different aspect ratio e.g. square, then you can't resize it without it changing back to it's original aspect ratio. You have to save the cropped photo first and then re-upload it before re-sizing, only then can you re-size to the new aspect ratio. Obviously a bug.