how did you root your phone? do you have a link to the guide? do you have a custom recovery? which one if you do? have you made a nandroid backup? what model phone do you have? who is your carrier?

 

SMS limits and the amount you can send are set by your carrier and your account with them, and not by the phone itself, for example you might have a limit of say 200 free SMS a month. Rooting and modifying the phone won't get around that

 

I think they might have been trying to remove limits on how many SMS they can send in a period of time, which is controlled by the phone. Only that should not require root to change, just some adb commands.

However, there is a very old app of that name out there that does require root. Whether it works on an M8 is a different question, since it seems to have been tested only up to Android 4.3. Personally I'd try that XDA link I posted above and see whether that solves the problem.

(I've no ideal what this "SQLite installer" is for though: the thing I found is an apk, and I can't see anything about it requiring some additional package).