Hi James, I believe you should be able to. It needs to be a separately named instance. I have SQL Express 2012 and SQL 2014 Standard installed on my machine.
Thanks Prasad. Do I need to open any port like PDM?
It can be done.
We had the same issue namely having SQL 2008 R2 but needing a more recent version so as to be able to run SWelectrical 2016.
Our VAR helped us out by installing a SQL 2012 Express version.
Don't forget to archive all existing projects with the SWelectrical version you had before the 2016 version.
That way you can then import the archieve into the 2016 version and thereby populating your SQL 2012 express based database.
Have a nice one