Poppet

Hello Grzegorz The two Topics below will have all the Information you require, Please review them and choose a license that pertains your situation. http://www.prepar3d.com/forum/viewtopic.php?f=6305&t=9438

*bump to top*

26) Prepar3D Refreshing the Graphics (Organic Tweak) A simple step you can take to help Prepar3D run more smoothly. These steps are not required But Recommended after completing the following tasks. (1) Updating Prepar3D v3 \ v4 using the Update Component Installers (Client) (2) Updating your Graphics Driver (3) Installing a new Graphics Card

25) Error message "Living World Settings In LWcfg.xml are Invalid" How to fix the following error message when launching Prepar3D "Living World Settings In LWcfg.xml are Invalid"

24) Error message "api.dll was not found reinstalling the program may fix this problem" How to fix the following error message when launching Prepar3D "api.dll was not found reinstalling the program may fix this problem"

23) How to locate the Scenery.cfg file, Simobjects.cfg file & the Terrain.cfg file A Quick tutorial to show you how to locate the Scenery.cfg file, Simobjects.cfg file & the Terrain.cfg file

lol That's gas

Hello Jorn You can Install and use any version of v3 and any version of v4 on the same SSD no problem at all v2, v3 and v4 are described as major versions and you can Install all 3 of these If you like on the same or different SSD (separate folders of course). v3, v3.3 and v3.4 are described as minor versions of v3 and you Can Not Install more then 1 version. The same apply's for v4 of course

Yes Oliver's way is the cleanest, Have different disks \ operating systems and change or boot into the desired operating system. Prepar3D will Install across all User accounts, If you create another User account you will notice you will have a copy of Prepar3D on your new user account, You will of course have no generated files at this point but will be created when you launch Prepar3D. The two user accounts will be linked, for example if you run the delete generate files command on user account 1, this will also remove the generate files on user account 2, When you launch Prepar3D on either user account the generate files will generate on both user accounts. The same apply's for Add On control panels, One user account will duplicate the two of them. So this way is a no go. As Oliver mentioned all major versions of Prepar3D use the same reg license paths This is what you will see when trying to Install v4 Academic with v4 Pro-Plus currently Installed

Topics on the same Issue merged together

Hello Matt Sometimes programs will not load. If you have restated your computer and now Prepar3D launch's Ok I wouldn't worry about it at all. If you are having a continuous Issues with Prepar3D let us know and myself or one of the Forum users will try and help

I will lock this Topic as the OP is now using a more recent version of Prepar3D v4 (v4.3) --- If needed, Create another Topic on this Issue with updated Information 1) Prepar3D version 2) Operating system 3) All add-ons installed (applications, scenery, vehicles, etc.) 4) Hardware (graphics card, CPU, RAM, displays, etc.) 5) Changes made to your system – overclocking, graphics accelerators (NVIDIA Inspector), debuggers 6) Changes to Prepar3D's settings or configuration files 7) Crash logs or error messages

22) How to locate the Shaders folder A Quick tutorial to show you how to locate your Shaders folder in all versions of Prepar3D

21) How to locate the Prepar3D.cfg File (Config file) A quick tutorial to show you how to locate your Prepar3D.cfg file

20) Prepar3D v4 will Not launch, Stuck on loading (Removing all 5 generated folders) This Video will show you how to bring Prepar3D v4 back to a default state by removing the generated files. Note: This process will disable your 3rd party Add Ons