Can't resolve assembly

Hello,
I’m trying the demo before purchasing, downloaded and install built 1438
I opened my .NET Framework 4.8 exe and just clicked “Compile” button, but I got this error message:

Can't resolve assembly: SharpDX, Version=4.2.0.0, Culture=neutral, PublicKeyToken=b0dcf0f35e5521f1

Also, is there a tutorial on how to correctly use VMProtect with .NET apps? Like, must I add the following code for all my methods?

[Obfuscation(Feature = "virtualization", Exclude = false)]

Or this is not important? and just leave default options and compile?

Thanks in advance.

I opened my .NET Framework 4.8 exe and just clicked “Compile” button, but I got this error message:

It means that the assembly was not found on your computer.

Also, is there a tutorial on how to correctly use VMProtect with .NET apps? Like, must I add the following code for all my methods?

Please read our user manual.