Can't return to older version of Ionic

Recently I updated my ionic version trying to solve a problem and now my code should need a lot of refactoring to work on the new version.
I don’t remenber exactly witch version I use to have, but considering the changelogs it would be something around 2.00-beta.7. I tried to uninstall and then install the older version and I keep getting the same errors:

-npm install -g ionic@2.0.0-beta.7

gyp ERR! stack Error: Python executable “C:\Program Files (x86)\Python36-32\python.EXE” is v3.6.1, which is not supported by gyp.
gyp ERR! stack You can pass the --python switch to point to Python >= v2.5.0 & < 3.0.0.
gyp ERR! stack at failPythonVersion (C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:454:14)
gyp ERR! stack at C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:443:9
gyp ERR! stack at ChildProcess.exithandler (child_process.js:197:7)
gyp ERR! stack at emitTwo (events.js:106:13)
gyp ERR! stack at ChildProcess.emit (events.js:191:7)
gyp ERR! stack at maybeClose (internal/child_process.js:877:16)
gyp ERR! stack at Socket. (internal/child_process.js:334:11)
gyp ERR! stack at emitOne (events.js:96:13)
gyp ERR! stack at Socket.emit (events.js:188:7)
gyp ERR! stack at Pipe._handle.close [as _onclose] (net.js:493:12)
gyp ERR! System Windows_NT 10.0.14393
gyp ERR! command “C:\Program Files\nodejs\node.exe” “C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js” "rebuild"
gyp ERR! cwd C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\ionic\node_modules\ionic-app-lib\node_modules\awesome-typescript-loader\node_modules\deasync
gyp ERR! node -v v6.7.0
gyp ERR! node-gyp -v v3.4.0
gyp ERR! not ok

then I tried using --python=python2.7 on the call
npm install --python=python2.7 -g ionic@2.0.0-beta.7

gyp ERR! configure error
gyp ERR! stack Error: Can’t find Python executable “python2.7”, you can set the PYTHON env variable.
gyp ERR! stack at failNoPython (C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:449:14)
gyp ERR! stack at C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\lib\configure.js:404:11
gyp ERR! stack at FSReqWrap.oncomplete (fs.js:123:15)
gyp ERR! System Windows_NT 10.0.14393
gyp ERR! command “C:\Program Files\nodejs\node.exe” “C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\npm\node_modules\node-gyp\bin\node-gyp.js” "rebuild"
gyp ERR! cwd C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\ionic\node_modules\ionic-app-lib\node_modules\awesome-typescript-loader\node_modules\deasync
gyp ERR! node -v v6.7.0
gyp ERR! node-gyp -v v3.4.0
gyp ERR! not ok
Build failed

and always together with those errors I got:

npm WARN optional SKIPPING OPTIONAL DEPENDENCY: fsevents@1.0.5 (node_modules\ionic\node_modules\ionic-app-lib\node_modules\webpack\node_modules\watchpack\node_modules\chokidar\node_modules\fsevents):
npm WARN notsup SKIPPING OPTIONAL DEPENDENCY: Unsupported platform for fsevents@1.0.5: wanted {“os”:“darwin”,“arch”:“any”} (current: {“os”:“win32”,“arch”:“x64”})
npm ERR! Windows_NT 10.0.14393
npm ERR! argv “C:\Program Files\nodejs\node.exe” “C:\Users\Igor Guazzelli\AppData\Roaming\npm\node_modules\npm\bin\npm-cli.js” “install” “–python=python2.7” “-g” "ionic@2.0.0-beta.7"
npm ERR! node v6.7.0
npm ERR! npm v3.10.8
npm ERR! code ELIFECYCLE

npm ERR! deasync@0.1.4 install: node ./build.js
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the deasync@0.1.4 install script ‘node ./build.js’.
npm ERR! Make sure you have the latest version of node.js and npm installed.
npm ERR! If you do, this is most likely a problem with the deasync package,
npm ERR! not with npm itself.
npm ERR! Tell the author that this fails on your system:
npm ERR! node ./build.js
npm ERR! You can get information on how to open an issue for this project with:
npm ERR! npm bugs deasync
npm ERR! Or if that isn’t available, you can get their info via:
npm ERR! npm owner ls deasync
npm ERR! There is likely additional logging output above.

npm ERR! Please include the following file with any support request:
npm ERR! C:\Users\Igor Guazzelli\Documents\mobilecare-ionic\PreverMessagesV2\npm-debug.log
npm ERR! code 1

This error only occurs when I try to install versions < beta.24

Thanks in advanceIgor G. Cost