V1.0.0.2 as a server (setup as service) - concerns and advice needed


First of all, surprsing that I have to manually setup a service.
With that done it is working ok, but I am concern that it is a bit fragile.

We have had isses when an admin is logging on the console with another user and pdfcreator is started. Since the settings are loaded from the registry on this user we have now started another instance that will not work.

I would like to load settings from ini file to avoid strange issues like this. I my opinion this is better for a server softeare.
It would perhaps also be nice to block miltiple instances.

The only workaround I can think of is to remove permissions to the exe for all other users.

Any advice on this topic?