Win Explorer preview disbled when Nitro 12 installed

[Waymore 0]

When Nitro Pro 12 was installed, the Preview function in Windows Explorer was disabled and I cannot get it functioning again.  The Preview Pane icon does not function.

Any suggestions on how to enable?

[AllainU 0]

Hello @Waymore,

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

I recommend that you repair your Nitro Pro via the Control Panel > Programs and Features. Please refer to this article: http://kb.gonitro.com/knowledgebase#/search/repair/000001641

If that didn't help, re-register the DLL file using the following Administrator command (Admin CMD): 

For 32-bit: 
regsvr32 -u "C:\Program Files (x86)\Nitro\Pro\12\NitroPDFPreviewHandler.dll" 
regsvr32 "C:\Program Files (x86)\Nitro\Pro\12\NitroPDFPreviewHandler.dll" 

For 64-bit: 
regsvr32 -u "C:\Program Files\Nitro\Pro\12\NitroPDFPreviewHandler.dll" 
regsvr32 "C:\Program Files\Nitro\Pro\12\NitroPDFPreviewHandler.dll" 

Thanks for choosing Nitro Pro and I hope this helps!