Adding Arduino Library to proteus 8

when i googled to add arduino library to proteus8 version there are many examples came But I still faced the problem while installing arduino library in proteus version 8.

the usual procedure to add library is
1.download the library
2. paste it in your LIBRARY folder

the problem is I don't find the library folder in program files
so i clicked on the L in the P L device menu



and by clicking create library we can know the path where the LIBRARY folder is