So after having installed a ton of viewers over time to assist my business partners, I found that suddenly the slurl links in fish hunt's website would just not work, reason I found was that Windows simply pointed all secondlife:\\ slurls clicked to a whole other universe in outer space.
To fix this annoying issue, I came across this small powerful application:
Steps to fix your Windows->SL slurl links:
1. Create a shortcut to your viewers .exe file eg. firestorm-bin.exe (for Firestorm) SingularityViewer.exe (for Singularity) CoolVLViewer.exe (for CoolViewer)... Well you get the idea.
2. Start Slurl Proxy up and drag'n'drop your newly created shortcut straight to its window.
3. Tick the Default checkbox for the viewer.
Now you can click slurls on websites again and instantly get a landmark opened inside your SL viewer :) ENJOY!