TL : DR I’m on Win 7 64bit, I downloaded Unity on 15/02/15 and MonoDevelop doesn’t work or exist.
So I’ve been following a tutorial along and got to the bit where is says to create a .cs file. I created it by Assets > Create > CScript but then couldn’t open it in MonoDevelop. I thought “hey, doesn’t matter, I enjoy Notepad++ anyhow” so I found the file opened it in Notepad, added my script and saved it. Back in Unity I tried to attach it to my player object and it said it couldn’t because it didn’t exist. I checked and double checked the file name / class name etc then started wondering if it was the fact that it hadn’t been opened in MonoDevelop. All the script is in the inspector pane so I went ahead and clicked the open button at the top of that. It seemed that nothing had happened until I noticed the message
Unable to open Assets/Scripts/Editor/CleanProject.cs: Check external application preferences
had appeared in the bar in the bottom. I checked the External Application Preferences as suggested and nothing. I even searched both my hard drives for MonoDevelop.exe and nothing came up (although I did find a mono.exe which did nothing). I checked Taskmanager processes to see if MonoDevelop was there and just stuck but no. So I reinstalled Unity. It was the next logical step. When it was done installing again I thought I’d check out the AngryBots example file, see if I would get the same sort of errors. Not only did I get the exact same error as before, it popped up with a compile error on the .js scripts,
BCW0028: WARNING: Implicit downcast from ‘UnityEngine.Component’ to ‘UnityEngine.AudioSource’.
Now I’m stuck. I really want to develop with Unity but I’d imagine it’s pretty impossible if I can’t get any scripts to run.
Also, I tried posting this on the Answers page but it kept complaining about the tags I tried to use so that’s why I’m posting it here.