You can't. We only look in two places:
1) the place we copy it to when you use the license manager to install a license
2) the win or bin subdirectory of your SlickEdit installation.
The first one is used by the majority of users and we've not had any problems reports for that. The second location is to allow people to have a portable install of SlickEdit, like on a flash drive, that they use on multiple computers.
The first location should work with the scenario you originally described. What problem are you experiencing?