What problem are you facing?
All you have to do is download, from your Lynkoa account, the installation file corresponding to your SW version and the license file.
The installation is done normally, and then when you start loading the license file.
Hello
Check that your antivirus doesn't take MyCad like a trojan, something I've experienced... To do this, you will just have to pause your antivirus for the duration of the installation, and maybe when you launch it with solidworks, to add it as an exception.
Something I had to do when I installed mine, when it was the first version
Have a nice day