diff --git a/src/api.js b/src/api.js
index 2065dfb..be93ca8 100644
--- a/src/api.js
+++ b/src/api.js
@@ -100,7 +100,7 @@ const getBucketFiles = async (folderName) => {
 
             if (parts[3] === "windows") {
               const setup_key =
-                item.key.substring(0, item.key.length - ext.length - 1) +
+                item.key.substring(0, item.key.length - ext.length) +
                 "_setup.exe";
               oldItems.push(setup_key);
               oldItems.push(setup_key + ".sha256");
@@ -127,12 +127,12 @@ const getBucketFiles = async (folderName) => {
         const setup_key =
           filteredItems[i].key.substring(
             0,
-            filteredItems[i].key.length - ext.length - 1,
+            filteredItems[i].key.length - ext.length,
           ) + "_setup.exe";
         const setup_name =
           filteredItems[i].name.substring(
             0,
-            filteredItems[i].name.length - ext.length - 1,
+            filteredItems[i].name.length - ext.length,
           ) + "_setup.exe";
 
         setup_items.push([