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How to "refresh" P3D back to a clean factory state?

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Hi, I wanted to know what I can or need to do in order to make my current installation of P3D back to factory defaults. I wanted to do some troubleshooting to see why I'm getting strange frame rate issues.


Do I just delete the C:\programdata\user\appdata\roaming\lockheed martin\prepar3d v2\ folder and reload up the sim to let it recreate everything from scratch? Is this safe to do? Because I currently have orbx global, vector, ezdok, asn, rex, and many add-ons installed.



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How can you get to a "fresh" state if you keep your add-ons?  Uninstall P3d and reinstall for a complete refresh.


Or delete the prepar3d.cfg file and get somewhat back.


If you're chasing framerates - the ONLY way you'll be able to tell for sure is to uninstall ALL add-ons. Uninstall P3D. Delete the P3D folders.


reinstall - and THEN check frames - anything else and you're blowing smoke.


I guess you COULD make a copy of the entire P3D folders - then just uninstall P3D and delete the left over folders - reinstall to same location and do your testing. Once done, just copy the old P3D back over the new install to recover add-ons.


It could be easy or messy - depends.


EDIT: the link Jim provided is the way to go.


Have fun,



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Jim, thanks for that. I'll have a look at that. 


I'm upset that when uninstalling my previous version of p3d using the control panel > uninstall in Windows 7, it didn't delete those other mentioned folders. Sigh. I certainly don't want to reinstall p3d and all my add-ons all over again. That will take ages. :(


Hopefully I'll be able to delete those mentioned folders and let p3d recreate everything again without having to reinstall.


Can I just delete these 4 folders and let p3d recreate them all over again?


%userprofile%\Documents\Prepar3D v2 files

%Programdata%\Lockheed Martin\Prepar3D v2

%appdata%\Lockheed Martin\Prepar3D v2

%localappdata%\Lockheed Martin\Prepar3D v2

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It IS worth the hassle of totally uninstalling P3D (once you've uninstalled all your addons!) cleaning the drive then starting again. Takes hours but worth it in the end. 

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Can I just delete these 4 folders and let p3d recreate them all over again?

you can do what you want BUT if you want a "refreshed state" - that will not work.


The uninstaller can ONLY delete the files that it installed - not any 3rd party files that it doesn't know about.


the saying is - "You can't have your cake and eat it too!"


Decide which you want -


1) Vanilla refreshed P3D




2) All add-ons intact


When you make that decision we might be able to help but you can not have both unless you backup and restore as I mentioned.



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