P: Information regarding Lightroom 6.x (Pre-LrClassic)

​@dj_paige by way of follow up to above, whilst the link to the instructions worked, there was a flaw in that it installs the base LR 6.0 version, without any of the subsequent patches. As such, LR did not have RAW support for my camera (whereas I had it in version 6.14 before).  Any attempt to re-install kicks off the online sign-in loop again and going the offline route again will merely facilitate a re-installation of 6.0.  Eventually, I got around this using the method below, so am posting here to the extent useful to anyone else in similar position:

 

Bypassing the Lightroom 6 Update Loop & Restoring 6.14 Support
===================================================

THE PROBLEM:
When migrating Lightroom 6 to a new Windows PC, the standard installer 
triggers an un-skippable Adobe Sign-In loop. Disconnecting the internet 
and using Adobe's "Offline Challenge/Response" code generator successfully 
activates the software, but it drops the program back to baseline Version 6.0. 

Because Adobe has retired the 6.14 update servers, trying to update from 
inside LR 6.0 triggers a subscription page or an activation countdown that 
can permanently lock your license. This leaves you trapped on 6.0 with 
zero native support for newer cameras.

THE SOLUTION (The "Old PC" Folder Swap):
Because Lightroom 6 is largely self-contained, you can bypass the broken 
installer entirely by pulling the pre-patched 6.14 core application files 
from your old computer and dropping them onto the new, activated system.

PREREQUISITES:
- Your new PC must already be successfully activated on LR 6.0 using the 
  offline request/response method.
- You must still have access to your old PC where Lightroom 6.14 was 
  previously running.
- A USB flash drive or external hard drive.

STEP-BY-STEP WORKFLOW:

1. COPY FROM THE OLD PC:
   - Boot up your old computer and insert your USB flash drive.
   - Open File Explorer and navigate to: C:\Program Files\Adobe\
   - Locate the folder named "Adobe Lightroom". (This contains the 
     fully patched 6.14 execution files).
   - Right-click the "Adobe Lightroom" folder, select Copy, and paste 
     it directly onto your USB drive. 
   - Eject the drive and turn off the old computer.

2. PASTE TO THE NEW PC:
   - Ensure Lightroom 6.0 is completely closed on your new computer.
   - Plug the USB drive into the new computer.
   - Open File Explorer and navigate to: C:\Program Files\Adobe\
   - Paste the "Adobe Lightroom" folder from your USB drive into 
     this directory.
   - Windows will prompt you that files already exist. Select: 
     "Replace the files in the destination".

3. VERIFY:
   - Launch Lightroom on the new PC.
   - Go to Help > About Adobe Photoshop Lightroom. 
   - It will now explicitly display Version 6.14 (Camera Raw 10.1).

WHY THIS WORKS SAFELY:
The new computer's Windows registry already holds your valid offline 
license token from your 6.0 activation. By overwriting the folder, you 
are not changing the license; you are simply replacing the outdated 6.0 
engine with the 6.14 engine. No internet connection or broken installer 
wizards are required, completely removing the risk of a 7-day lockout.
==========================================================

Thanks for the link. I read the whole thing. The problem is that I've reached the activation limit. My computer crashed and I had to uninstall LR6. When I tried to reinstall from the CD, a message popped up saying the activation limit had been reached. I guess, in my case, there's nothing I can do now, even offline activation. I don't think it will work.

If you know any way to get around this, please let me know.