After a complete formatting of my PC and later reinstalling of Windows 10, i reinstalled Prepar3D v4.5 (the last version) in a new partition without any problem. Afterwards i reinstalled again PMDG B737 NGX but i got a notice telling that it can't find the registry P3D path as you can see in the following screenshot:
https://mega.nz/#!9IwDkCJT!jsj3O-Xib9-nPUrDrs3KnKnx6nkO64wMSiOEQb8HLZE
Nevertheless, I revised the registry and I see in the HKEY_LOCAL_MACHINE that SetUp Paths for Prepar3Dt, Clien, Content and Scenery exist and are correct according to de Partition where are installed.
I also downloaded the last installers for PMDG B737 NGX and the result is the same.
Now I am stuck at this point and need some help. Thanks