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Won't Open

Tonya Mattes

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My Nitro Pro wont open. It started this morning. I uninstalled and reinstalled it. Now it won't open and I only get a thumbnail when I hover over it in my taskbar that says "Nitro Pro (EXPIRED TRIAL)" 


I cannot open it or operate it. I need this for work. I am continually having issues with Nitro Pro and I am very unhappy with the product, but it is what my office uses. 

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Reymund Oyong

Greetings @Tonya Mattes

Thank you for reaching out to us through our Community Forums!

I have seen this behavior before when the application launches but it just appears in Windows' Taskbar and it does not exhibit any error message. 
Please try the following and see if it helps:

1. Open Nitro PDF Pro again. 
2. From the Windows Taskbar, focus on Nitro Pro by clicking on it.
3. Press the Windows key + Left/Right arrow on your keyboard until the Nitro Pro window appears.

Sometimes this happens when Nitro Pro is stuck outside the displayed area on your monitor. 
You can also check if you can move the Nitro Pro window (in case it's off-screen) by holding Shift and right-clicking the Nitro Pro icon in the Taskbar and selecting, "Move". Then, continuously press the Left/Right arrow key on your keyboard until it appears on the screen.

You may also try Maximizing the application in the Task Manager > Processes tab. When you see the Nitro Pro icon under the Processes tab of Task Manager, expand it then right-click and select Maximize (see attached screenshot for reference). 

Once the application appears on the screen, activate it to remove the Expired Trial message. To activate, navigate to the Help tab > About Nitro Pro then click the Activate button. Enter the license then click Activate. 

Kind regards,

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  • 2 weeks later...

Good morning @Reymund G.!

I have restarted my computer numerous times. Uninstalled/Reinstalled Nitro. I am continuing to have the same issue. None of the remedies above worked.


Edited by Tonya Mattes
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