Hello jhaydenite,
I apologize for the inconvenience.
Please re-try downloading the Android Version again and let us know if it works also make sure that any other versions of PRO are deleted.
Out of date client or Cannot download
Download the latest client version here.
Due to technical constraints, the Android client will always be a bit delayed before being released with the other client versions. So please be patient and refrain from spamming threads about it. Thank you, and apologies for the inconvenience.
In some cases, if you re-download the client but still see the out-of-date message at the login screen, you will need to clear your cache. You can use CClearner for that.
If you're using a shortcut to launch the game, then you will need to update that as well. Finally, make sure you've fully removed the game files from previous, outdated clients before re-installing.
Client Mirror Links
Mega NZ
Mediafire
I hope this helps you solve your issue.