I have bought UnityVS and it was working well with VS2010. Later Microsoft aquiared their company and now UnityVS is a free plugin with one difference: it is much more unstable.
I had several issues with new updates and finally I decided the move to completely new version which is called "Visual Studio Tools for Unity" instead of UnityVS.
I am using Microsoft Visual Studio Community Edition 2013 Update 4 (which is actually a VS Professional). Everything looks good but it attached to the process because the plug icon on lower right corner tells me it is attached to Unity Editor (My version of Unity Editor is 4.5.5f1). However when I click on "Attach to unity" button it only compiles and then does nothing (it doesn't lock). As a result I am unable to debug because it doesn't hit any breakpoint.
Please somebody help me because even their support page doesn't show any useful link to talk with them (It is Microsoft anyways!)