I do believe you have to have impulse to use any Stardock App's

Well To install

note you can make impulse not load on start up,,  or you can uninstall impulse BUT you will not get any updates

I myself have Impulse not load on start up but do load it every now and then to check for ups

Edit

Is this the first time you have downloaded any Stardock software?

The reason I ask is Impulse is the replacemnt for Stardock Central which was just the means or tool for downloading and checking for updates to the software that you purchased.  You do not need to have Impulse running to use the software once you have it downloaded.

If you have some other questions about Impulse ask them, the community will try and answer them.