If you have lost LOST.DIR files and have exhausted all the methods you know without success, a reliable solution is to use third-party data recovery software such as the DiskInternals Partition Recovery app. This software is compatible with all Windows OS computers and features a user-friendly interface, including a Wizard interface, making it accessible to virtually any computer literate user.
With DiskInternals Partition Recovery, you can recover lost LOST.DIR files and folders from any storage device, drive, disk, or media. It offers three recovery modes, making it easy for you to select the one that works best for you. Additionally, the software is more advanced than the DiskInternals Uneraser software, which is also good for system-wide data recovery on any disk. Moreover, the Partition Recovery software supports all the known file system formats for Windows, macOS, and Linux OSes.
DiskInternals Partition Recovery allows you to recover lost folders and LOST.DIR files, no matter how they were deleted from the computer.

You only pay for the PRO version after confirming that your lost files have been recovered. The built-in File Preview engine enables you to preview the recovered files for confirmation before upgrading your software to save them on your PC or remote storage. Here's a guide on how to use DiskInternals Partition Recovery.
Note that DiskInternals Partition Recovery uses an advanced recovery algorithm trusted by IT experts for more than 15 years.