You can download the released (stable) version 1.06 of the app from the Play Store:
https://play.google.com/store/apps/details?id=dynalogix.hint2search

v1.10 (with easy disable CM12, LG, Samsung voice dialers) is in the beta channel. See details about it in my post below. How to get beta releases of Hint2Search?

Join this group
Click on this link and become a beta tester: https://play.google.com/apps/testing/dynalogix.hint2search
Download the app from the Play Store: https://play.google.com/store/apps/details?id=dynalogix.hint2search
Note: You can only beta test if you own the license to Hint2Search ($1.49+TAX) Anyone who takes part in the beta testing and wants to opt out will get an unconditional refund. Just shoot me an email.
Please always let me know if you find something broken in the BETA version. The beta version is intended to give you early access to new features, but also to filter out any potential problems before the wider audience gets entrance.

I welcome your questions, requests and comments too!

How to exit from beta:

Uninstall the beta version from your device (if done outside the 2hrs refund window, you will be able to re-install it any number of times)
Go (back) to https://play.google.com/apps/testing/dynalogix.hint2search and un-enlist from the beta channel
The Play Store then will revert to show the stable (non-beta) version (look in the "What's new" section)
Install

Hint 2 Search: full Google Now from Bluetooth Headset

Use this app to trigger the full experience Google Now through the headset, not just the voice dialer part of it.

HOW TO SETUP
►Install Hint2Search
►Start it and select if you want it to bypass your lock screen (swipe only, you cannot bypass security lock)
►Press the button on the Hint
►Select Hint2Search in the "Complete action using..." dialog box
►Press "Always"

and that is it: you are good to go

Screen shots:

Working fine with my HTC One M8.

Todd S