Hi,
I think this should apply once you restarted the UiPathRobot Service(from services.msc) after you followed the instruction bellow (looks like you did).
I just retested on on 2018.2.3 (Enterprise) and this still work.
The popup is not showing anymore the destination location.
Note that this approach will be come obsolete as in 2018.3 version, you will be able to provide Custom location when you publish.
Cheers