-There have been several reports of v6.0 not opening in Windows. Although v6.14 seems more stable, but no longer supported and fast losing functionality in new Operating Systems. Download here-Lightroom 6 End of Support
- The existence of Creative Cloud Desktop App on a system changes v6 to the 'Subscription' version. You would need to 'Clean' you system of Adobe files and re-install v6.14 to continue as 'Perpetual'.
- And also Activations (two maximum) can only be changed by a Chat with Support.
Lightroom 6 - serial number maximum allowed co...
Lightroom-Classic v11.4 is the latest release and upgrade for v6.xx $9.99 PHOTOGRAPHY PLAN (USA)
Regards. My System: Lr-Classic 12.2 Photoshop 24.2, ACR 15.2, Lightroom 6.2, Lr-iOS 8.0.8, Bridge 13.0.2, Windows-11.