I wonder if anyone reading might be able to help.

I have Loquendo installed on my Tablet which is running Android 4.1.2 and have a problem setting it as the default TTS in my settings.

After installing it, Loquendo shows up in the 'Settings/Language & Speech/Text to Speech' along with the default 'Pico TTS'.
The Pico is set as the Preferred Engine' but when I tap on Loquendo TTS to make that my preferred engine it does not change.

Can anyone advise on what might be the issue.

TIA