Blue Iris

If you export the following registry branch, and open in something like Notepad++, which will tell you how many lines there are.
HKEY_LOCAL_MACHINE\SOFTWARE\Perspective Software

How many lines do you have?

There are 1,029,295 in mine! That's a bit over ONE MILLION lines! I'm interest if this is normal.

I'm thinking there is duplication due to multiple users? I'll need to test that out.

1.1 million.

Thank you for checking. Nice to know this is probably the norm.

There's a lot of mapping for zones. I would have thought they would be empty unless used. I'm going to try an experiment... I'm going to clone a camera. Then go into the registry and delete all the zone mapping, and see if it populates okay when used. If successful, this would probably save 9/10th of the registry usage for BI.

Something else to consider is you have connected to ant other BI installation using BI5's remote management, it will import that machines registry and save itin yours under remotes. So I connected to 2 other machines and my registry size tripled.