When you see something like HASH(0x1a2b3c4d) it means you are looking at a reference. To look inside such things Data::Dumper is quite useful. For example have a look at:

use Data::Dumper;
print Dumper( $hlv->$Sheer->Hyperlinks(1) )
[download]

and you will be able to see you need to add ->Address to your call to get the value you want.