I use IrfanView to view/print DJVU files created by other programs, so I have a collection of them. I upgraded to Win10 at the end of July, and the new IrfanView 4.40 shortly thereafter. I installed both 32-bit and 64-bit IrfanView, and the plugins.
After that, I observed that 64-bit IV wouldn't show DJVU files, but that was not too serious, because 32-bit IV would, I just had to remember to "Open With" 32-bit IV, rather than simply click on the file.
But today, I made a new DJVU file and clicked it, and it failed to open in 64-bit IV, so then I did the "Open With" dance, and it failed to open in 32-bit IV. The file was made using the same process that other DJVU files successfully opened by IV in the past was made... I tried one of the older ones, predating all the updates, and it failed to open in 32-bit IV.
I uninstalled 64-bit IV, and it seems to have uninstalled the 64-bit IV and the 32-bit plugins, leaving the 64-bit plugins behind.
I reinstalled the 32-bit plugins, and deleted the C:\Program Files\IrfanView\Plugins directory.
Still, 32-bit IV would not open the DJVU file.
I uninstalled 32-bit IV, and reinstalled IV 4.38. It won't open the file either.
Now I'm wondering if this is a problem with a recent Windows 10 update... not that I'm aware of any Windows 10 updates that happened today, but there may have been some since I was last successful opening a DJVU file in 32-bit IV 4.40.
I don't see anything unusual in the Registry, regarding IrfanView, but I'm no expert in what to expect there, other than the file associations.
After that, I observed that 64-bit IV wouldn't show DJVU files, but that was not too serious, because 32-bit IV would, I just had to remember to "Open With" 32-bit IV, rather than simply click on the file.
But today, I made a new DJVU file and clicked it, and it failed to open in 64-bit IV, so then I did the "Open With" dance, and it failed to open in 32-bit IV. The file was made using the same process that other DJVU files successfully opened by IV in the past was made... I tried one of the older ones, predating all the updates, and it failed to open in 32-bit IV.
I uninstalled 64-bit IV, and it seems to have uninstalled the 64-bit IV and the 32-bit plugins, leaving the 64-bit plugins behind.
I reinstalled the 32-bit plugins, and deleted the C:\Program Files\IrfanView\Plugins directory.
Still, 32-bit IV would not open the DJVU file.
I uninstalled 32-bit IV, and reinstalled IV 4.38. It won't open the file either.
Now I'm wondering if this is a problem with a recent Windows 10 update... not that I'm aware of any Windows 10 updates that happened today, but there may have been some since I was last successful opening a DJVU file in 32-bit IV 4.40.
I don't see anything unusual in the Registry, regarding IrfanView, but I'm no expert in what to expect there, other than the file associations.
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