How to deal with the problem that JPG/PNG association is reset after IrfanView update

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At the timing of updating from IrfanView Version 4.50 to 4.51, the association of the image file JPG/PNG was reset and it returned to the Windows standard photo viewer.

So far, I've left multiple troubleshooting notes about Windows associations, but this one has no effect.

[Trials | PLAN-A, B]

1. How to start IrfanView in administrator mode and change the association
2. How to start Registry Editor and remove IrfanView.exe

association

I was able to change the association from the Windows 10 Settings app "Default Program", so I will share the steps I performed.

The third procedure (PLAN-C) is the method to restore the association.

PLAN-C

Use the Windows 10 settings app "Default Program".

Start button: Right click> Settings> Apps> Default apps

Or

Windows 10> Control Panel (Display method: Small icon)> Default program> Default program settings

Change the default application from "Photo" to "IrfanView 64-bit".

What causes the association to be reset?

When updating IrfanView, changing the association options may reset the association.

Let's change the association after updating.

Summary

When updating IrfanView using the installer, please complete the update without changing the association setting dialog.

[Update procedure]

1. Complete the update without changing the association options
2. Change association after update
3. Change the association from "Default Program"

How to change the association

Plans A to C.

1. Start IrfanView in administrator mode
2. Delete [IrfanView.exe] key using Registry Editor
3. Use the "default app" that comes with Windows 10 (this article)

For the specific procedure, please read the related article.

 External link

• IrfanView-Official Homepage-One of the Most Popular Viewers Worldwide

Verification: Irfanview 4.51
Windows 10 Pro Fall Creators Update, 1709

：SC2

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