# SOLVED: "Negative Lab Pro remains in Trial Mode even after entering my serial number"

**URL:** <https://forums.negativelabpro.com/t/solved-negative-lab-pro-remains-in-trial-mode-even-after-entering-my-serial-number/119>\
**Category:** Troubleshooting and Bugs\
**Created:** [March 25, 2019, 1:40pm UTC](https://forums.negativelabpro.com/t/solved-negative-lab-pro-remains-in-trial-mode-even-after-entering-my-serial-number/119 "2019-03-25T13:40:52Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![nate](https://yyz1.discourse-cdn.com/flex029/user_avatar/forums.negativelabpro.com/nate/32/4_2.png) [@nate](https://forums.negativelabpro.com/u/nate)\
**Post date:** [March 25, 2019, 1:40pm UTC](https://forums.negativelabpro.com/t/solved-negative-lab-pro-remains-in-trial-mode-even-after-entering-my-serial-number/119/1 "2019-03-25T13:40:52Z")

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### Problem:

“I entered my Negative Lab Pro serial key into the Lightroom plugin-manager. It appeared to be successful, but then when I try to use Negative Lab Pro, it is still in trial mode, and I see my remaining uses counting down.”

### Solution:

First, make sure you have the most recent version of Negative Lab Pro.

Then, follow these steps to force Lightroom to keep your Negative Lab Pro registration.

1. **Exit Lightroom**
2. **Hold down Shift-Option** (on Windows it’s **Shift-Alt** ) as you double-click on your Lightroom app to re-open Lightroom. Keep holding them down and the dialog below will appear.  
 ![reset-prefs](https://cdck-file-uploads-canada1.s3.dualstack.ca-central-1.amazonaws.com/flex029/uploads/negativelabpro/original/1X/5c5da945bcca7f1f86881701898a5dfaaf7d75a7.png)
3. Select " **Reset Preferences"**
4. You will now need to add Negative Lab Pro back to the Plugin Manager, and reenter your serial number, but this time it should stick.

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**Author:** ![Arianhoorn](https://yyz1.discourse-cdn.com/flex029/user_avatar/forums.negativelabpro.com/arianhoorn/32/2240_2.png) [@Arianhoorn](https://forums.negativelabpro.com/u/Arianhoorn)\
**Post date:** [December 29, 2020, 7:37pm UTC](https://forums.negativelabpro.com/t/solved-negative-lab-pro-remains-in-trial-mode-even-after-entering-my-serial-number/119/2 "2020-12-29T19:37:47Z")

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thanks nathan , the problem is sloved

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**Author:** ![Larsi64](https://avatars.discourse-cdn.com/v4/letter/l/3ab097/32.png) [@Larsi64](https://forums.negativelabpro.com/u/Larsi64)\
**Post date:** [October 29, 2024, 11:00pm UTC](https://forums.negativelabpro.com/t/solved-negative-lab-pro-remains-in-trial-mode-even-after-entering-my-serial-number/119/3 "2024-10-29T23:00:23Z")

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Hi, I can’t do that. I will not activate my NLP. I cant remove the plug in either. ( WIN11) How to solve this?? Frustrating, kr Lars