Whats the best way, uninstall and then reinstalling?
First of all, I am assuming that you are going to be installing on the same server. If you are trying to move the server, there are other instructions.
Once you have the 2017 install files, there is a folder called "swlicmgr". Copy that folder to the desktop on the server. Within that folder is a file called "Setup.exe". Double click that file and the install of 2017 will begin. Just follow the prompts and you should be able to select "next" on all the screens. After the install, try to open the 2017 SolidNetwork License Manager (SNL). If prompted to "Activate" select "yes". Follow the prompts and at the end you should be shown that the product has been activated and you are good to go.
There usually is not any reason to transfer or uninstall the old SNL. The only thing that may create issue is if the server IP address has changed since you activated the old version of the SNL (this will make it look like you are trying to install the SNL on a new server).
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