diff --git a/README.md b/README.md
index 59d4161..b68963c 100644
--- a/README.md
+++ b/README.md
@@ -66,12 +66,12 @@ Please contact [MrThanasiz](https://github.com/MrThanasiz)/[Novvator](https://gi
 
 ## Versioning
 
-For the versions available, see the [tags on this repository](https://github.com/your/project/tags). 
+For the versions available, check the [Releases tab on the repository](https://github.com/MrThanasiz/UoM-Erasmus-Helper/releases). 
 
 ## Authors
 
-* **Athanasios Stefanidis** - *InputDataFrame / Score / Tips / UniversitySelectFrame* - [MrThanasiz](https://github.com/MrThanasiz/)
-* **Konstantinos Petridis** - *LogRegCheck / Secretariat / SecretariatFrame* - [Romputer](https://github.com/Romputer)
+* **Athanasios Stefanidis** - *InputDataFrame / Score / Tips / UniversitySelectFrame / ValidationCheck* - [MrThanasiz](https://github.com/MrThanasiz/)
+* **Konstantinos Petridis** - *LogRegCheck / Secretariat / SecretariatFrame / Student* - [Romputer](https://github.com/Romputer)
 * **Stamatis Sellas** - *Department / MainFrame / University* - [Novvator](https://github.com/Novvator)
 * **Stefanos Fokianos** - *CentralRegistry / CreateFile / HomeFrame / RegisterFrame* - [Stef-Fokianos](https://github.com/Stef-fokianos)
 
diff --git a/src/CentralRegistry.java b/src/CentralRegistry.java
index 8710293..acbff3e 100644
--- a/src/CentralRegistry.java
+++ b/src/CentralRegistry.java
@@ -8,7 +8,7 @@ public class CentralRegistry
 	
 	private static ArrayList<Student> students;
 		
-	public static boolean initializedList = false;
+	private static boolean initializedList = false;
 		
 		
 	@SuppressWarnings("unchecked")
@@ -41,6 +41,28 @@ public static void desirializeUsers(){
 		    c.printStackTrace();
 		}
 	}
+	 
+	public static void serializeUsers() {
+			
+		String filename = "student.ser"; 
+		     
+		// Serialization  
+		try{    
+			//Saving of student in a file 
+		    FileOutputStream file = new FileOutputStream(filename); 
+		    ObjectOutputStream out = new ObjectOutputStream(file); 
+		              
+		    // Method for serialization of Student s
+		    out.writeObject(students); 
+		              
+		    out.close(); 
+		    file.close(); 
+		              
+		    // System.out.println("Serialization worked"); 
+		}catch(IOException ex) {
+		    System.out.println("IOException is caught"); 
+		}
+	}
 	
 	  public static Student registerNewUser() {
 	  
@@ -53,34 +75,6 @@ public static Student registerNewUser() {
 		  
 		  return s.get(s.indexOf(stud));
 	  }
-	 
-
-
-		public static void serializeUsers() {
-			
-		     String filename = "student.ser"; 
-		     
-		     // Serialization  
-		     try{    
-		    	 //Saving of student in a file 
-		         FileOutputStream file = new FileOutputStream(filename); 
-		         ObjectOutputStream out = new ObjectOutputStream(file); 
-		              
-		         // Method for serialization of Student s
-		         out.writeObject(students); 
-		              
-		         out.close(); 
-		         file.close(); 
-		              
-		         // System.out.println("Serialization worked"); 
-		     }catch(IOException ex) {
-		    	 
-		        System.out.println("IOException is caught"); 
-		     } 
-		  
-			
-			
-		}
 		
 		public static ArrayList<Student> getStudents(){
 			
@@ -158,6 +152,10 @@ public static ArrayList<Department> getDepartments(){
 			return departmentsList;
 		}
 		
+		public static boolean initializedList() {
+			return initializedList;
+		}
+		
 		public static void assignStudsToDeps() {
 			for(Student student: students) {
 				for(int i = 0; i < departmentsList.size(); i++)
diff --git a/src/LogRegCheck.java b/src/LogRegCheck.java
index a266f2e..fd94b80 100644
--- a/src/LogRegCheck.java
+++ b/src/LogRegCheck.java
@@ -3,7 +3,7 @@ public class LogRegCheck {
 	public static Student checkUsername(String aUsername) {
 		
 		//We need a initializedList variable in Central Registry
-		if ( !CentralRegistry.initializedList )
+		if ( !CentralRegistry.initializedList() )
 			return null;
 		
 		for(Student student: CentralRegistry.getStudents())