You have no "if", so there's no "else".
You also have an unbalanced number of braces, so the code outside the matched braces is either ignored, or can possibly produce errors depending on what is the text. I don't want to guess what "if" condition you're wanting to make $true in order for the $false to cause your "else" to take action.

The curly braces allow grouping several lines of commands into one branch of a conditional, so you can do something like:'

if ($version > 7) {
command1
command2
}
else {
command3
command4
}

It looks like you need to read a little more about how the scripting language works. Take a better look at your /help as well as look at
https://en.wikichip.org/wiki/mirc/conditional_statements
and other similar topic links there.