You can try to copy them from the save folders on your phone and send them to your pc.
For Android check these folders:
1. SD:/Android/data/[something with academy in it]/files/saves/
2. [Your local storage]/Documents/RenPy_Saves/[something with academy in it]
On PC saves are stored in:
C:\Users[username]\AppData\Roaming\RenPy\ACADEMY34-v0.2.3
And just to specify - you don't need to download any specific patches, you can just play on the latest one since it has all the content the game has to offer!