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Paint.net crashes upon opening

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Error message appears upon opening. I tried reinstalling the program (multiple times,) and running PdnRepair. 

Crash Message:

System.Configuration.ConfigurationErrorsException: Configuration system failed to initialize ---> System.Configuration.ConfigurationErrorsException: Unrecognized configuration section runtime. (C:\Program Files\paint.net\PaintDotNet.exe.Config line 3)
   at System.Configuration.ConfigurationSchemaErrors.ThrowIfErrors(Boolean ignoreLocal)
   at System.Configuration.BaseConfigurationRecord.ThrowIfParseErrors(ConfigurationSchemaErrors schemaErrors)
   at System.Configuration.ClientConfigurationSystem.EnsureInit(String configKey)
   --- End of inner exception stack trace ---
   at System.Configuration.ConfigurationManager.PrepareConfigSystem()
   at System.Configuration.ConfigurationManager.get_AppSettings()
   at PaintDotNet.Program.InitializeAppInstallType() in D:\src\pdn\src\PaintDotNet\Program.cs:line 572
   at PaintDotNet.Program.Start() in D:\src\pdn\src\PaintDotNet\Program.cs:line 304
   at PaintDotNet.Program.Main(String[] args) in D:\src\pdn\src\PaintDotNet\Program.cs:line 1765


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21 minutes ago, Insanity49 said:

System.Configuration.ConfigurationErrorsException: Unrecognized configuration section runtime.


Your installation of the .NET Framework is probably corrupt.


Please run the SFC utility:



Let us know how it goes.

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It might be worth running the paint.net repair tool. You'll find it in your installation folder (where you installed paint.net). The file is called PdnRepair.exe.

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Ran PdnRepair.exe, gave this output: 


The return code from this utility is 0 (success), 1 (fail), or an MSI error code like ERROR_SUCCESS_REBOOT_REQUIRED (3010).
Use /nopause to avoid 'Press Enter to exit...' at completion.

* Opening registry key, HKEY_LOCAL_MACHINE\SOFTWARE\paint.net: ok
* Retrieving MSI product code GUID from ProductCode value: {6FED3D93-C0FA-4BD7-A36F-7FC53698244F}
* Attempting to repair with MsiReinstallProductW(REINSTALLMODE_FILEREPLACE) (same as msiexec.exe /fa): success, but REBOOT IS REQUIRED, dwResult=3010

Return code is 3010
Press Enter to exit...

I'm restarting my computer now.

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I know it sounds pedantic, but did you do a cold reboot or a warm restart? I'd recommend you try a cold reboot then run the repair tool again.

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