ATC Pro real world weather fix

The "download real world weather" option broke when aviationweather.gov switched from HTTP to HTTPS

To fix this issue patching of wxSimulator.dll was required to point to the new URLs being used and and disabling SSL certificate validation

I've included a patched DLL as well as the steps to patch the DLL manually since downloading DLLs from the internet is usually frowned upon.

Patched DLL download

Virus total check

Download wxSimulator.dll

To install:

• Make a backup of wxSimulator.dll (usually found in C:\Program Files (x86)\Flag Mountain\ATCpro)
• Download the DLL provided above
• Copy the downloaded DLL into your game folder (usually C:\Program Files (x86)\Flag Mountain\ATCpro)

Manual DLL patch

Environment setup and finding the DLL

• Download dnSpy 32 bit

• Run dnSpy, Select File > Open..., navigate to the ATPro install folder (usually C:\Program Files (x86)\Flag Mountain\ATCpro) and open ATCPro.exe

• At the top of the dnSpy window click Start. This will open a new window, make sure the Executable field points to ATCPro.exe and click OK. ATCPro should now launch

  

• At the top of the dnSpy window click the Pause icon.

  

• At the bottom of the dnSpy window click on Modules. Right click anywhere in the Modules Pane and select Open All Modules

  

Fixing the download URLs

• On the left side pane called Assembly Explorer, expand the module wxSimulator, expand wxSimulator.dll, expand SimWeather

  

• In the Assembly Explorer right click on SimWeather() and select Edit Method Body....

  

• A new window will open. Line 12 will contain the URL ATCPro tries to fetch the METAR information from. Change the URL from http://aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz to https://aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz After changing the URL press OK

  

• In the Assembly Explorer right click on SimWeather(FacilityLocationInformation, string) and select Edit Method Body...

  

• A new window will open. Line 12 will contain the URL ATCPro tries to fetch METAR information from. Change the URL from http://aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz to https://aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz After changing the URL press OK

  

• In the Assembly Explorer right click on SimWeather(FacilityInformation, string, string) and select Edit Method Body...

  

• A new window will open. Line 12 will contain the URL ATCPro tries to fetch METAR information from. Change the URL from http://aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz to https://aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz After changing the URL press OK

  

• In the Assembly Explorer right click on SimWeather(FacilityInformation, int, int, int, wxCategory, string) and select Edit Method Body...

  

• A new window will open. Line 12 will contain the URL ATCPro tries to fetch METAR information from. Change the URL from http://aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz to https://aviationweather.gov/adds/dataserver_current/current/metars.cache.xml.gz After changing the URL press OK

  

Final step, fixing SSL errors

• In the Assembly Explorer pane, right click on DownloadMetar() and select Edit Method (C#)...

  

• A new window will open showing the source code. Add the following 2 lines to the code to match the picture below

  System.Net.ServicePointManager.Expect100Continue = true;
  System.Net.ServicePointManager.SecurityProtocol = System.net.SecurityProtocol.Tls12;

  

• Once your changes has been made, click Compile

• If all went well the Compilation should be successfull and the window automatically closed.

• At the top left corner of dnSpy click on File > Save Module..., make sure to change filename by clicking on the three dots ... and navigating to your Desktop folder

  

• Click OK

• You can now close dnSpy

Finishing up

• Go to your ATCPro install directory (usually C:\Program Files (x86)\Flag Mountain\ATCpro) and make a backup of wxSimulator.dll
• Copy wxSimulator.dll from your desktop to the install directory and replace if neccesary
• "download real world weather" should now be working