When installing a program without antivirus, the extension .wwka was added to all files

JMJ

I installed an offline dictionary and it changed all the file extensions, added to the end of the name .WWKA and when I remove this extension and return the file to the original name it appears corrupted and cannot be opened. Does this have a solution?

GregoryH

All your files have probably been encrypted by a variation of the DJVU ransomware virus. You could try some of the solutions here as it is not something BitDefender can fix :-

https://www.pcrisk.com/removal-guides/21295-wwka-ransomware