I think downgrade your cli is not good idea becuase they are fixing lots of bug. You can specific your angular in package.json file. don't depend on your cli.
Edit
First install latest version from your cli. Then Specify the version you want in the 'dependencies' section of your package.json. For example if you want Angular 4.3.4 then you can edit you package.json file like
"dependencies": {
"@angular/animations": "^4.3.4",
"@angular/common": "^4.3.4",
"@angular/compiler": "^4.3.4",
"@angular/core": "^4.3.4",
"@angular/forms": "^4.3.4",
"@angular/http": "^4.3.4",
"@angular/platform-browser": "^4.3.4",
"@angular/platform-browser-dynamic": "^4.3.4",
"@angular/router": "^4.3.4",
...........................
...........................
}
Also change your devDependencies
"devDependencies": {
"@angular/compiler-cli": "^4.3.4",
"@angular/language-service": "^4.3.4",
.............
}
and change package-lock.json
{
.........
"packages": {
"": {
............
"dependencies": {
"@angular/animations": "^4.4.4",
"@angular/common": "^4.4.4",
"@angular/compiler": "^4.4.4",
"@angular/core": "^4.4.4",
.............
}
now run npm install
npm install
After finishing install you should see your version by ng -v
command like this
Angular CLI: 1.6.3
Node: 9.3.0
OS: linux x64
Angular: 4.4.6
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router, tsc-wrapped
@angular/cli: 1.6.3
@angular-devkit/build-optimizer: 0.0.38
@angular-devkit/core: 0.0.25
@angular-devkit/schematics: 0.0.48
@ngtools/json-schema: 1.1.0
@ngtools/webpack: 1.9.3
@schematics/angular: 0.1.13
@schematics/schematics: 0.0.13
typescript: 2.4.2
webpack: 3.10.0