There is no "Clear Route" button in the menu of the 9.170 SE navcore and you can't "install" it. The way you clear a route is tap on the bottom status bar, on the bottom right. A window will then come up and give you the option to clear it.
The 9.061 is more suited to the small screen ONE models. The freezing/rebooting problem is a glitch that affects only the larger 4.3 inch screens, like your ONE XL, which is why I've been recommending the 9.170 SE navcore for all ONE and ONE XL models. I believe the 9.061 navcore is a missing data.chk file that the ONE XL needs, but I am unable to test it until I come across another ONE XL model.
I'm not sure which v9 navcore offers BOTH the automatic shut-down AND start-up feature. I think that feature hasn't been available for a while now, but it would be great to know which navcore has both these functions.