untuk upgrade atau downgrade, anda harus menghapus aplikasi sebelumnya.
saat menghapus asplikasi sebelumnya, pastikan BB restart terlebih dahulu, baru install yg baru/lama.

before upgrade you must uninstall previous application. then reboot.
then you can install.

from 142 to 143, you don't need to uninstall 142, just install 143

from 143 to 145, you don't need to uninstall 143, just install 145

1.4.3 accidentally deleted
just install 1.4.5 :D

whats new 
[1.4.6]
-bug fix for space url
-can download operamini

[1.4.5]
added category, to categrized application