the latest source code requires VS 2013 and .NET 4.5
we no longer support 3.5 or 4.0 though it "may" be possible for an expert to produce a build for those frameworks with some difficulty, it definitely is not something for a beginner to try. we offer no support for that.
with .net 4.5 and VS 2013 update 4 you would build the mojoportal.sln, set a connection string then run the mojoPortal.Web project