I'm sorry to hear you're frustrated with our ExportPDF service.
To use the ExportPDF service, simply visit http://exportpdf.acrobat.com and click 'Sign in' at the top right corner. Enter your Adobe ID (email address) credentials to log into the service. As ExportPDF is web-based, you simply utilize the tool through your web browser. After you're logged in, you should see the ExportPDF interface, with a button saying 'Select PDF file..' to get the process started. After the file is converted, you will be presented with the option to 'Save' the converted file to your hard drive.
If you have any trouble with these steps, take a look at this document for some help: Troubleshooting Common Problems with ExportPDF
Please let us know if you have any questions.