I can't install the latest android version

[vsub_]

Any idea why?
I can't install it by using google play because gplay don't allow you to install anything if you have less than 200mb free space(my system partition have 170mb free space but I have 10gb internal storage and 30gb sd card)so I have to download it from here and install it(the same thing I did with 1.6.3)

My phone is using android v5(lolipop)
When I try to install it,after a while a message appears "App not installed"

If I uninstall my current version,will I loose any save data?

[lavilao]

try downloading it from ppsspp.com

[AkuNaRahman]

IDK about the Installation, but. If you want to Uninstall, make sure you move the save data first. Other wise it'd be deleted and you'll lost your save data...

[[Unknown]]

The save data is stored on your internal storage, and won't be lost by deleting the app.

-[Unknown]

[vsub_]

I was able to install it by removing the old one first