In my last post "What's In My Add-Ins Tab?" I mentioned two addin-ins that are installed by simply placing the 'dll' files into the addins folder for your Revit installation. The process is very simple, but if you are not familiar with dll files, you may find this quick tutorial helpful.
In this example, we are going to use 'View Renumber' by LMN add-in now found on GitHub.
Firstly, navigate to Timothy Logan's GitHub repository here. Scroll down the list and look for 'Revit_Renumber Viewports'.
Once on this page, you will notice a folder 'Deploy', (the description is 'adding ZIP file with deployable build of plugin'). Click this folder and download the zip file inside.
Once downloaded, you will find 3 files inside, two 'dll' files and an 'addin' file. You will need all 3 files for the add-in to work.
Navigate to your Revit installations addin folder. This should be in a similar location to; C:\ProgramData\Autodesk\Revit\Addins\ [Your Revit version year]
Copy and paste the downloaded files into this folder. Finally, right click on each of the files and select Properties. At the bottom there is a security warning about the file, ensure that 'Unblock' is ticked.
That's it, you can now boot up Revit and you will notice a new tab at the top 'LMN' (the name of the company that created the addin) with your add-in installed and ready to use.