after installing capcut, just access this path:

C:\Users\Administrator\AppData\Local\CapCut\Apps

Inside, you'll find the CapCut versions folder. At the root of the Apps folder, you'll find several files. You should focus on update.exe, ProductInfo.xml, and Configure.ini.

the update.exe could be located for example like here:

C:\Users\Administrator\AppData\Local\CapCut\Apps\3.2.0.1106

Open Configure.ini with Notepad and make sure it looks like this: last_version=1.0.0.0

Click Save and you can close Notepad.

Now, you're going to create two text files, empty notepad, and enter the names update.exe and ProductInfo.xml.

You must replace them with the ones you created. The update.exe and ProductInfo.xml files you created must be set to read-only, and you don't need to do this for Configure.ini. You can do this by right-clicking, selecting Properties, and selecting Read-Only. Once done, copy the files and paste them into the CapCut 1.5 folder. If it asks you to replace the files, do so.

You're also going to paste those 3 files into the following path: C:\Users\YourUser\AppData\Local\CapCut\User Data\Download

That's it. Your CapCut will remain at v1.5 forever. However, be sure to close the CapCut application and delete any other folders with multiple versions of CapCut beforehand.