diff --git a/src/main.js b/src/main.js
index 0e9c786..80669a5 100755
--- a/src/main.js
+++ b/src/main.js
@@ -35,7 +35,7 @@ var Locale = {
 		,"MDB file not found":
 			"No se encontro el fichero MDB"
 		,"Cache files have been deleted":
-			"Se han borrado todos los ficheros cacheados"
+			"Se han borrado todos los ficheros de la caché"
 	}
 };
 
@@ -227,19 +227,11 @@ var App = {
 
 			var version = this.fetchVersion();
 
-			if (version) {
+			if (version !== null) {
 				this.disableUi(true, _('Updating'));
-				var remoteFile;
-
-				if (version.code == 'last') {
-					remoteFile = this.module +'.7z?';
-					remoteFile += version.number
-						? 'v'+ version.number
-						: new Date().getTime();
-				} else {
-					remoteFile = '.archive/'+ this.module +'/'+ version.number;
-				}
-
+				var remoteFile = version
+					? '.archive/'+ this.module +'/'+ version +'.7z'
+					: this.module +'.7z?'+ new Date().getTime();
 				remoteFile = Conf.remoteUrl +'/'+ remoteFile;
 	
 				var request = new ActiveXObject('MSXML2.XMLHTTP');
@@ -258,66 +250,59 @@ var App = {
 	/**
 	 * Gets information about the version to download.
 	 * 
-	 * @return {Object} Version information or %null if local is up-to-date
+	 * @return {Number|Boolean} Version number, %false if cannot
+	 * fetch or %null if local is up-to-date
 	 */
 	fetchVersion: function() {
 		// Gets the last version number using the MySQL ODBC connection
 
-		var mysqlConn;
+		var mysqlConn = new ActiveXObject('ADODB.Connection');;
 
 		try {
-			mysqlConn = this.openOdbc({
+			mysqlConn.open(this.getOdbcString({
 				'Driver': '{MySQL ODBC 5.1 Driver}',
 				'Server': Conf.dbHost,
 				'Database': Conf.dbName,
-				'User': this.$('user').value,
-				'Password': this.$('password').value,
-				'SslVerify': 1,
-				'SslCa': this.certFile
-			});
+				'Uid': this.$('user').value,
+				'Pwd': this.$('password').value,
+				'Sslverify': 1,
+				'Sslca': this.certFile
+			}));
 		} catch (err) {
-			var dbErrors = mysqlConn.errors;
+			var dbErrors = mysqlConn && mysqlConn.errors;
 
-			if (dbErrors.count > 0) {
-				var newErr;
+			if (dbErrors && dbErrors.count > 0) {
 				var dbError = dbErrors.item(0);
 
 				switch (dbError.NativeError) {
 					case 1045: // Access denied
 						clearPassword = true;
-						newErr = new Error(_('Bad login'));
-						newErr.code = 'BadLogin';
+						err = new Error(_('Bad login'));
+						err.name = 'BadLogin';
 						break;
 					case 2003: // Can't connect
-						newErr = new Error(_('Server can\'t be reached'));
+						err = new Error(_('Server can\'t be reached'));
 						break;
 					default:
-						errorMsg = dbError.description;
+						err = new Error(dbError.description);
 				}
 
-				dbErrors.clear();				
-				throw newErr;
-			} else
-				throw err;
+				dbErrors.clear();
+			}
+
+			throw err;
 		}
 	
 		var sql = "SELECT version FROM versiones WHERE programa = '"+ this.module +"'";
 		var rs = mysqlConn.execute(sql);
 
-		var lastVersion = rs.EOF ? null : parseInt(rs.fields(0).value);
-		var version = {
-			code: 'last',
-			number: lastVersion
-		};
+		var version = rs.EOF ? false : parseInt(rs.fields(0).value);
 
 		rs.close();
 		mysqlConn.close();
 
-		if (this.$('previous-version').checked && lastVersion > 1)
-			version = {
-				code: 'previous',
-				number: lastVersion - 1
-			};
+		if (this.$('previous-version').checked && version > 1)
+			version -= 1;
 
 		// Checks if it's already open
 
@@ -346,33 +331,32 @@ var App = {
 		var localVersion;
 
 		try {
-			var mdbConn = this.openOdbc({
+			var mdbConn = new ActiveXObject('ADODB.Connection');
+			mdbConn.open(this.getOdbcString({
 				'Provider': 'Microsoft.Jet.OLEDB.4.0',
 				'Data Source': this.mdbFile
-			});
+			}));
 
 			var oRs = new ActiveXObject('ADODB.Recordset');
 			oRs.Open('SELECT Version FROM tblVariables', mdbConn);
-			localVersion = oRs.EOF ? -1 : parseInt(oRs('Version'));
+			localVersion = oRs.EOF ? false : parseInt(oRs('Version'));
 			
 			oRs.close();
 			mdbConn.close();
 		} catch (e) {}
 		
-		// Compares the local version with the requested version
+		// Determines if should download
 
-		return !localVersion || localVersion != version.number
+		return !localVersion || version === false || localVersion != version
 			? version
 			: null;
 	},
 
-	openOdbc(options) {
+	getOdbcString: function(options) {
 		var optionsArray = [];
-		for (var option of options)
+		for (var option in options)
 			optionsArray.push(option +'='+ options[option]);
-
-		var conn = new ActiveXObject('ADODB.Connection');
-		return conn.open(optionsArray.join(';'));
+		return optionsArray.join(';');
 	},
 	
 	onRequestReady: function(request) {
@@ -428,7 +412,7 @@ var App = {
 	},
 	
 	catchError: function(err) {
-		var clearPassword = err.code == 'BadLogin';
+		var clearPassword = err.name == 'BadLogin';
 
 		if (!this.$('remember').checked || clearPassword)
 			this.regWrite(Conf.dsPath, 'PWD', '', 'REG_SZ');