diff --git a/GameEngine/Admin/Mods/editAdminInfo.php b/GameEngine/Admin/Mods/editAdminInfo.php
index 747c02dd..672ae9cf 100755
--- a/GameEngine/Admin/Mods/editAdminInfo.php
+++ b/GameEngine/Admin/Mods/editAdminInfo.php
@@ -14,7 +14,7 @@ if($_SESSION['access'] < 9) die(ACCESS_DENIED_ADMIN);
 include_once("../../Database.php");
 $id = (int) $_POST['id'];
 
-if (file_exists('constant_format.tpl')) {
+if (!file_exists('constant_format.tpl')) {
     die(
         'You seem to be running a new version of TravianZ which was installed using an old installer.<br />' .
         'Please download <strong>constant_format.tpl</strong> file and copy it into the <strong>GameEngine/Admin/Mods</strong> ' .
diff --git a/GameEngine/Admin/Mods/editExtraSet.php b/GameEngine/Admin/Mods/editExtraSet.php
index e4b4cdc1..7ad37818 100755
--- a/GameEngine/Admin/Mods/editExtraSet.php
+++ b/GameEngine/Admin/Mods/editExtraSet.php
@@ -14,7 +14,7 @@ if($_SESSION['access'] < 9) die(ACCESS_DENIED_ADMIN);
 include_once("../../Database.php");
 $id = (int) $_POST['id'];
 
-if (file_exists('constant_format.tpl')) {
+if (!file_exists('constant_format.tpl')) {
     die(
         'You seem to be running a new version of TravianZ which was installed using an old installer.<br />' .
         'Please download <strong>constant_format.tpl</strong> file and copy it into the <strong>GameEngine/Admin/Mods</strong> ' .
diff --git a/GameEngine/Admin/Mods/editLogSet.php b/GameEngine/Admin/Mods/editLogSet.php
index 14b801b2..59b1ab1f 100755
--- a/GameEngine/Admin/Mods/editLogSet.php
+++ b/GameEngine/Admin/Mods/editLogSet.php
@@ -14,7 +14,7 @@ if($_SESSION['access'] < 9) die(ACCESS_DENIED_ADMIN);
 include_once("../../Database.php");
 $id = (int) $_POST['id'];
 
-if (file_exists('constant_format.tpl')) {
+if (!file_exists('constant_format.tpl')) {
     die(
         'You seem to be running a new version of TravianZ which was installed using an old installer.<br />' .
         'Please download <strong>constant_format.tpl</strong> file and copy it into the <strong>GameEngine/Admin/Mods</strong> ' .
diff --git a/GameEngine/Admin/Mods/editNewsboxSet.php b/GameEngine/Admin/Mods/editNewsboxSet.php
index 10a2fc9c..f1ec6e0e 100755
--- a/GameEngine/Admin/Mods/editNewsboxSet.php
+++ b/GameEngine/Admin/Mods/editNewsboxSet.php
@@ -14,7 +14,7 @@ if($_SESSION['access'] < 9) die(ACCESS_DENIED_ADMIN);
 include_once("../../Database.php");
 $id = (int) $_POST['id'];
 
-if (file_exists('constant_format.tpl')) {
+if (!file_exists('constant_format.tpl')) {
     die(
         'You seem to be running a new version of TravianZ which was installed using an old installer.<br />' .
         'Please download <strong>constant_format.tpl</strong> file and copy it into the <strong>GameEngine/Admin/Mods</strong> ' .
diff --git a/GameEngine/Admin/Mods/editPlusSet.php b/GameEngine/Admin/Mods/editPlusSet.php
index 1ff28834..6f271bd4 100644
--- a/GameEngine/Admin/Mods/editPlusSet.php
+++ b/GameEngine/Admin/Mods/editPlusSet.php
@@ -15,7 +15,7 @@ include_once("../../Database.php");
 include_once("../../config.php");
 $id = (int) $_POST['id'];
 
-if (file_exists('constant_format.tpl')) {
+if (!file_exists('constant_format.tpl')) {
     die(
         'You seem to be running a new version of TravianZ which was installed using an old installer.<br />' .
         'Please download <strong>constant_format.tpl</strong> file and copy it into the <strong>GameEngine/Admin/Mods</strong> ' .
diff --git a/GameEngine/Admin/Mods/editServerSet.php b/GameEngine/Admin/Mods/editServerSet.php
index 78838fa4..dc883216 100755
--- a/GameEngine/Admin/Mods/editServerSet.php
+++ b/GameEngine/Admin/Mods/editServerSet.php
@@ -14,7 +14,7 @@ if($_SESSION['access'] < 9) die(ACCESS_DENIED_ADMIN);
 include_once("../../Database.php");
 $id = (int) $_POST['id'];
 
-if (file_exists('constant_format.tpl')) {
+if (!file_exists('constant_format.tpl')) {
     die(
         'You seem to be running a new version of TravianZ which was installed using an old installer.<br />' .
         'Please download <strong>constant_format.tpl</strong> file and copy it into the <strong>GameEngine/Admin/Mods</strong> ' .