Daz, install Visual C++ 2015 then,
Take a backup and delete the following files and directories and try again
Solitude.sln
DA410X.sdf
Intermediate/
Binaries/
Plugins/
Then copy the 4.10 plugin from DA archive into the plugins folder
Let me know if you face further issues.
You no longer need to create a C++ project to have a code plugin working. It requires some setup from my end. From the next build, you can convert your project back to pure blueprint and no longer require Visual studio. Will post most info then