TomL is correct. There is no point in you renaming or altering your addons folder since a Valve update won't touch those.
Using the steps presented by TomL will allow you to simply doubleclick on your newly created shortcut to update or validate your server files. No need to rename/delete/copy anything.
I run a TF2 Server. I have a separate directory called steamcmd with all of the steam cmd files. In that folder, I created two files....
First file: called: C:\steamcmd\update.bat
Quote:
steamcmd +runscript tf2update.txt
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Second file: called: c:\steamcmd\tf2update.txt
Quote:
login anonymous
force_install_dir C:\TF2Server
app_update 232250 validate
quit
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When I need to update, I simply go to a command prompt and type:
When it is done, I type: EXIT
You're done!