PRL Update Issues

[KBZL]

So I see that there is a new PRL update and I have been trying to update mine. I am getting the OMADM force close error running Fresh 2.1.2. Now I have read that this can be corrected by pushing OMADM.apk to system/app but here is the problem. I dont currently have access to my pc that has all my files to push the file through ADB. Why doesnt it work using a file explorer to move the OMADM.apk to the correct folder? Im just trying to figure out the easiest way to do this without using ADB. Thanks.

EDIT: Dont need help anymore. Still dont understand why pushing through ADB works but oh well.....