Hi there! I understand how frustrating it can be to see that "PDF viewer needs updating" message while trying to use GPSmyCity. This usually indicates that the app you're using is having trouble accessing or displaying PDF files correctly.

Here are a few steps to troubleshoot this issue:

1. Check for PDF Viewer Updates:
Make sure that your PDF viewer application (like Adobe Reader or a built-in viewer in your browser) is up-to-date. You can usually check this by going to the program's settings or help menu and selecting "Check for Updates."

2. Try a Different PDF Viewer:
If the current viewer isn’t working, you might want to try downloading a different PDF viewer from the Microsoft Store or uninstalling and reinstalling your current PDF viewer.

3. Clear Your Browser Cache:
Sometimes, clearing your browser's cache can resolve issues with loading apps. To do this in WebKit:
- Open your browser and go to settings.
- Find the option for 'Privacy or History' and clear browsing data.

4. Check Internet Connection:
Ensure that your internet connection is stable. If it's intermittent or slow, it might affect the loading and functioning of apps.

5. Contact Support:
If the problem persists, it may require deeper investigation. You can contact GPSmyCity support directly at [email protected] for further assistance.

Could you let me know what you've tried so far, or if you're seeing any particular error messages? This will help me provide more targeted assistance!