Yes , I am not able to figure out. All I understand is (\w+) is not matching Galaxy-FP or so.
Please help me with the solution.

Yes , I am not able to figure out.

Well, I was thinking about the second question , can you explain what (\w+\_\-) means?

Well, I told you, that was wrongly pasted. I was trying with something and did not clean my code before pasting. So it was.
Basically that means some word followd by a '_' and '-'.
But yes, that is not going to work , it was wrong.

Basically that means some word followd by a '_' and '-'.

Well actually no it doesn't, see perlintro#More complex regular expressions

item 8. matches a single character in the given set, so it matches a single word character or dash, but only one character

if you want to match it more than once, you have to use a quantifier like item 1 or item 2 from the quantifier list; or the second Quantifiers list in perlre

So you might write

m{^Users of (.+?): \(Total of (.+?) licenses issued; Total of (.+?) li
+cense in use\)$}im
m{^Users of ([^:]*): \(Total of (.+?) licenses issued; Total of (.+?) 
+license in use\)$}im
m{^Users of ([^:]+): \(Total of (\d+) licenses issued; Total of (\d+) 
+license in use\)$}im
m{^Users of ([\w\_\-]+): \(Total of (\d+) licenses issued; Total of (\
+d+) license in use\)$}im
m{^Users of ([\w\_\-]+): \(Total of (\d+) licenses issued; Total of (\
+d+)}im
[download]

Modern Perl ch 6 is also an introduction to regex