Shut down your server.
From our
www.ulyssesmod.net download page, download latest (highest number version) ULib.
Save it to anywhere on your disk drive other than your Gmod folders.
From our
www.ulyssesmod.net download page, download latest (highest number version) ULX.
Save it to same place on your disk drive that you saved ULib to.
Using Windows file explorer, go to where you saved your files to, open the zip file of ULib, copy and paste all files within it to your <gmod_server_path>\addons folder
Using Windows file explorer, go to where you saved your files to, open the zip file of ULX, copy and paste all files within it to your <gmod_server_path>\addons folder.
Before starting your server, read the file <gmod_server_path>\addons\ulib\ulib_readme.txt
Before starting your server, read the file <gmod_server_path>\addons\ulx\ulx_readme.txt
Those files contain much of the answers to your questions.
If those files don't help you, try our FAQ forum area area, mostly intended for troubles after ULX is properly installed. The readme files give a better idea of where/how to install. Always look for similar readme files in any releases \addons\<release> folder...most authors, Ulysses or not, give information there.