Develop module disabled

[Charlotte5E9E]

Please can someone help me. Pleaaaaaaaaase! I have spent nearly 2 hours on online chat with an adobe technician and no further forward. My Lightroom 6 which I bought on CD years ago, has suddenly disabled the develop module, saying please purchase a membership or license to reactivate. I have signed out, re entered serial number, signed in - no difference Deleted and re installed - no difference Done something in the library, adobe/application support - no difference It has been 2 weeks and this is driving me insane - I've been told this is an after launch issue so no one can help Anyone on here who can help? I'm on a mac book air 10.13.6 High Sierra Thank you Charlotte

[dj_paige]

https://helpx.adobe.com/x-productkb/global/installing-activating-try-buy-product.html

https://helpx.adobe.com/manage-account/using/convert-trial-to-membership.html

https://helpx.adobe.com/manage-account/kb/stop-creative-cloud-trial-mode-after-purchase.html

[Charlotte5E9E]

Thanks for these but none apply as I have a serial number but for some reaosn after I imput it still disables develop module

[dj_paige]

Are you 100% sure you are using Lightroom 6? How do you know? What does it say under Help->System Info (first 10 lines)?

What is the exact error message? Are you 100% sure you have the correct serial number? Go to account.adobe.com to verify your serial number.

[ManiacJoe]

Go to the Adobe web site and check out the status and product data in your Adobe account.

Anything looking odd there?

[GoldingD]

following