Can't run sketch on Android Phone

Hi, I'm trying to get Android Mode to work. I have two phones handy to try. 'A' version = 2.3.3 'B' = 4.4.2. Both have 'unknown sources' and 'usb debugging' switched on.

(I've been through the onRequestPermissionsResult issue as in several threads, downloaded AndroidMode 0250 and replaced.)

Sketch is minimal: void setup(){size(80,80);} void draw(){}

With A I want to select SDK for 2.3.3 but it's not offered on the IDE, Android, Select Target SDK. That shows from 7.1.1 down to 3.0. The SDK Manager is showing those and 2.3.3. + 3 more installed. How can I select 2.3.3 ?

With B (selected 4.4.2) the sketch builds, Console title bar says "Running sketch on device", console says "debug:", nothing visible on phone.