First of all you will need a software called AssetsBundleExtractorif you already have it let's start
Open UABE (Unity Assets Bundle Extractor)
Find Monobehaviour Network (Only SN Alpha v0.9.5.1 and newer Alpha Versions)
it should look like this
and now click Export Dump
and click yes if it's asking "Dump Export" Additional MonoBehaviour type information can possibly be retrieved in order to enhance dump output
click cancel if its asking for gine.TestRunner and GoogleAudioSpatializer
if a save as window comes click on Save button
now you will see a txt file name something like BackEnd-resources.assets- bla bla bla and .txt
open the txt file to edit it
and change platform to 0
and click on MonoBehaviour Network and click import Dump and choose the txt file we've edited
after you change the platform to 0 now you just need to save the txt file
now find MonoBehaviour PhotonServerSettings in Resources.Assets file with UABE
and click Export Dump Again
open the txt file and change string AppID to your own appid
you can get a Pun AppId on photonengine.com, remember only choose Pun AppId for SN Alpha, if it's Pre Beta and newer you can choose Photon Realtime or Pun
and now Save the txt file
click on MonoBehaviour PhotonServerSettings on UABE and click import Dump, and click on the txt file we've edited
and now click on File on UABE window, and click on Save
Save the name as resources.assets1
and now rename the resources.assets to resources.original
and rename the resources.assets1 to resources.assets
Done, if it does not work you might be doing something wrong