Trying to load a Visual Studio Solution using .Net Framework 4.6.2

Hi guys. 

I'm received custom code for a dynamics implementation as a visual studio solution.  The author using .Net framework 4.6.2. 

On my machine I've got 4.6.1. and 4. 7.2 

When I try to open his Soluntion, I get an error -- the project is using 4.6.2 which is not installed on this machine.  To proceed, (1) CHange the target to 4.6.1   (2)   Download .Net framework 4.6.2 and (3) do not load project. 

I figure the second option is the best, but when I go thru the process, the last step of the install says I have a higher version that 4.6.2 and hence, it wont install. 

Any suggestions would be appreciated.   Thank you