I have USCC and Your Navigator Deluxe is a free pushed app. I'm also running OS 6.0.433 on a Bold 9650. When I start YND it presents me with a Terms of Service screen to read where you either Accept or Exit. The only choice I ever get is to Exit. The cursor will not move over to the Accept button.
I had the same problem before, I had to go to application management through options and delete my navigator deluxe. I then had to re-install it and was able to get it to let me allow it. You can download it to the phone again from this link:
ota.telenav.com/otadownload/download/lookup_bundle.action?product=other&carrier=USCC&br andName=RIM%28BlackBerry%29&deviceIds=1304%2C1305% 2C1306%2C1324%2C1346%2C1347%2C1604&rootId=1053&roo tLink=ota.telenav.com%2Fota%2Fuscc&request_locale= en_US]TeleNav OTA