Hello Elmar!
Thank you for all your brilliant utils and native code!!!
There are still people around the world who loves asm and who cares "how is it done"!
Permission Remover is an app I wanted to find for a few monthes, but didn't found enough time to search, so found it eventually today. I definitely know how to make the job, but I was sure this job already was done by some experienced programmer.

Berfore your explanation I didn't had clue what will happen if app will be denied with some rights it was designed for. as you explained there should be handler in any normal app, that will handle access violation errors. I never wrote any Android Apps so have no clue on many internal things.
Sad to hear many users trust to the Google but don't trust to you, the man, who's brilliant apps they can explore in sources.
People around the world have no clue where are friends and where are enemies and what are criterias to estimate. They simply don't think by their brains!
They trust to the Google, which is, I'm definitely sure, is one of the biggest Matrix builders, but don't trust to the man, who most probably have enough pride and no any reasons to make anything bad, who's code is free and open sourced and small enough to evaluate by anyone...
Your Permission Remover is actual nowadays. I know, in 4.x Google have added settings dialog where user can disable some permissions to ant app, but 'unfortunately' not any permission. Furthermore you can't disable any permissions from GApps.
I don't maintain any accounts in my Android devices (there are absolutely no problems to DL apk's from forums like XDA etc and explore them manually on the PC before setting up) but i'm forced to use GApps because many (even patched) apps don't work without GApps. A few percent of apps don't work w/o account, I simply drop them (or try to patch).
Your app will help to fix some security holes in this meaning.
Why there is no desktop version of your app? If you're explored and have readymade procedure to parse and edit Manifest binary sructure ther should be no problem to port PR to PC (console version should be enough).
There is another problem today. Google dropped support for android 2.2 Froyo. It seems to lead no any problems for me. I don't require any support from Google, but they froced devs to use at least 2.3 related SDK even though most apps don't require any 2.3+ APIs. Bastards force users to drop their good enough but slightly old devices and buy new ones which will bring tons excessive of money to the google partners and will allow google to steal more data with ease.
From the brginnig of 2015 many apps got the new versions, These new versions were compiled with 2.3+ related SDK and uploaded to Play. If you try to install such a new APK on 2.2 device it simply refuses to install. I'm forced to look for older versions and try one by one unless latest installable one will be found.
I have a few devices with a Froyo and yes, I can upgrade most of them to the custom 2.3 FWs, but why not to try solve this problem by less expensive manifest fixation? I think many apps should be executable after such fixation.
Why not to add this function to the Permission Remover? Required functionality is to show APK's required API and related Android version and ability to edit this value. Desktop (Win/Lin) version also will be appreciated.
Futhermore, why no to allow user to edit any standard fields of manifest?

BTW Why don't you have official account on XDA-developers?
It's mobile software/hardware central around the world, so most of the 'smart' mobile world people publish their works and explorations there. There is also perfect 'marketplace' for a good stuff. Many devs and advanced users around the world will find your creatures and will eveluate them with honor. Furthermore, many devs publish their apps on XDA for free with APK's downloadable by anyone (XDA even don't require reg to download attachments!) while the same APKs are ofered for sell on Play (with small price) and are successfully sold as a goods or donations.

Sure, you are Welcome on XDA with your mobile apps (independently of this site)!