This is a firmware update, and usually that means that downloaded apps will be deleted. I only use SPMC so its not a big deal for me, but now we get the aptoid market as well.
The STB Emulator on Google Play was renamed to STBemu, so look for it that way. The reason why is that Infomir claimed that it infringed on its new android app, and it was taken down by Google, but mvas renamed it.
This update is pretty extensive, a firmware update, as well as software update, and your box will reboot itself about 4 times before completion.