While I understand your frustration, you may be barking up the wrong tree. To better assist you, please provide specific details on what issues you're having. Specifically:
What software are you using? You stated ARC, but which one? The various versions have different menus so providing this will allow users of this system to better help out. Answers would be "ARC-XT", "ARC310", "ARC500", etc.
What scanner are you using (be specific!)? Possible answers would be "GRE PSR-500", "Radio Shack PRO-197", "Whistler WS1065", etc.
What system(s) are you trying to download? Be specific here since many have similar names. Links to them from the RR database is best if you can provide them.
What issues are you having? "Downloading the database" really doesn't tell us much. Is the issue you can't log in? Is the issue that you your scanner can't communicate with your software? Are you getting any error messages (be specific!)? Screenshots of any errors can be very useful, if you're able to provide them as well (note attachments are size limited so you may need to crop them down using Paint or some other image software prior to attaching them).
One issue is you're asking for support from this web site that provides the data your software processes to program your scanner. This process is well documented and should be invisible to you as a user (except for the login process). Issues with how your software interacts with the database is something that your software provider should work out with this site's support team, not you. Not that it won't affect you, but simply because you can't answer the necessary questions they need to provide this support (e.g. "Which API call are you using that gives the error?").
If the issue is one of how you configure the software to communicate, or how you select the desired system(s) to download, or many other user related questions, the folks on this site can help you quickly get things right. We just need to know what your issues are and what your specific configuration is. Many software vendors (including BuTel, the maker of the ARC series) actively participate in these forums so support is not only from other users, but also from the software authors themselves.
You might try contacting BuTel Software directly as well. Information can be found on this link -->
Software for Uniden Whistler HOME PATROL HP1 HP-1 PRO-700 BCD436HP BCD536HP Radioshack GRE GRECOM MFJ DSE AOR police scanner software BCD996XT BCD396XT BC346T BCT15X PRO-404 PRO-405 PRO-97 PRO-96 PRO-2096 PRO-106 PRO-197 PRO-164 PRO-160 PRO-162 psr50 <--. Be aware that they are in the Netherlands so their work hours may not match what you may expect from a US based company.