Fixes for SDK.

plugins/c9.core/ext.js

@@ -562,7 +562,7 @@ define(function(require, exports, module) {
             
             function setAPIKey(apikey){
                 // Validate Key
-                if (!apikey || !apikey.match(/\w{28}=/))
+                if (!apikey || !apikey.match(/\w{27}=/))
                     throw new Error("Invalid API key");
                 
                 return {

plugins/c9.ide.plugins/loader.js

@@ -76,7 +76,7 @@ define(function(require, exports, module) {
                     wait++;
                     
                     var install = [];
-                    fs.exists(path, function(exists){
+                    fs.exists("~/.c9/" + path, function(exists){
                         if (!exists) {
                             install.push(options);
                             names.remove(name);