When you encounter issue that every online map which you select has blue or another color tint it is highly possible that you have accidentally enabled some OpenWeatherMap overlay. To fix this issue, follow these steps:

1. First off you need to start GPX Viewer.
2. Open left main menu.
3. Tap on Settings button.
4. In Settings tap on GPS button.
5. Uncheck Move to the lower part of the screen option.
6. Go back to map screen.