Downgrade Ionic Framework Version: 2.0.0-rc.3 to beta - ionic2

Question

I am using Ionic 2, and would like to downgrade the Ionic Framework Version: 2.0.0-rc.3 to the beta version.
ionic info
Your system information:
Cordova CLI: 6.4.0
Ionic Framework Version: 2.0.0-rc.3
Ionic CLI Version: 2.0.0-beta.31
Ionic App Lib Version: 2.0.0-beta.17
OS:
Node Version: v6.2.2
I have tried the following:
npm uninstall -g ionic
npm install -g ionic#2.0.0-beta.31
But as you can see, all this did was downgrade the Ionic CLI Version.
Question
How do I downgrade the Ionic Framework Version?
Any help appreciated.
UPDATE
My package.json has the folliwng:
"ionic-angular": "^2.0.0-rc.3",
Do I need to change this to:
"ionic-angular": "^2.0.0-beta.31",
Then do I run something to make the change take affect?
UPDATE
I tried deleting node_modules (from ...\AppData\Roaming\npm), but now I get:
npm install
npm WARN optional Skipping failed optional dependency /chokidar/fsevents:
npm WARN notsup Not compatible with your operating system or architecture: fsevents#1.0.15
npm WARN #angular/core#2.2.4 requires a peer of rxjs#5.0.0-beta.12 but none was installed.
npm WARN #angular/core#2.2.4 requires a peer of zone.js#^0.6.21 but none was installed.
npm WARN #angular/http#2.2.4 requires a peer of rxjs#5.0.0-beta.12 but none was installed.
npm WARN #angular/platform-browser#2.2.4 requires a peer of #angular/common#2.2.4 but none was installed.
npm WARN #angular/platform-browser-dynamic#2.2.4 requires a peer of #angular/common#2.2.4 but none was installed.
npm WARN #ionic/cloud-angular#0.4.0 requires a peer of #angular/core#>=2.0.0-rc.0 <2.0.0-rc.5 but none was installed.
npm WARN accounts-phone#0.0.1 requires a peer of meteor-client-side#~0.2.3 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/common#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/compiler#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/compiler-cli#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/core#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/forms#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/http#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/platform-browser#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/platform-browser-dynamic#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of #angular/platform-server#2.1.1 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of rxjs#5.0.0-beta.12 but none was installed.
npm WARN ionic-angular#2.0.0-rc.3 requires a peer of zone.js#~0.6.26 but none was installed.
npm WARN theWhoZoo# No repository field.
npm WARN theWhoZoo# No license field.
There is no node_modules folder now.

Answer 1

you can use this package.json for beta11 , i used this one to downgrade
{
"dependencies": {
"#angular/common": "2.0.0-rc.4",
"#angular/compiler": "2.0.0-rc.4",
"#angular/core": "2.0.0-rc.4",
"#angular/platform-browser": "2.0.0-rc.4",
"#angular/platform-browser-dynamic": "2.0.0-rc.4",
"#angular/http": "2.0.0-rc.4",
"#angular/forms": "0.2.0",
"es6-shim": "0.35.1",
"ionic-angular": "2.0.0-beta.11",
"ionic-native": "1.3.17",
"ionicons": "3.0.0",
"reflect-metadata": "0.1.8",
"rxjs": "5.0.0-beta.6",
"zone.js": "0.6.12"
},
"devDependencies": {
"del": "2.2.0",
"gulp": "3.9.1",
"gulp-watch": "4.3.5",
"ionic-gulp-browserify-typescript": "2.0.0",
"ionic-gulp-fonts-copy": "^1.0.0",
"ionic-gulp-html-copy": "^1.0.0",
"ionic-gulp-sass-build": "^1.0.0",
"ionic-gulp-scripts-copy": "^2.0.0",
"ionic-gulp-tslint": "^1.0.0",
"tslint-ionic-rules": "0.0.4",
"run-sequence": "1.1.5"
},
"name": "hhbuyer",
"description": "hhbuyer: An Ionic project",
"cordovaPlugins": [
"cordova-plugin-device",
"cordova-plugin-console",
"cordova-plugin-whitelist",
"cordova-plugin-splashscreen",
"cordova-plugin-statusbar",
"ionic-plugin-keyboard"
],
"cordovaPlatforms": []
}