Download always zip the files?

[osy999]

Describe the bug
It's always packing every images inside a ZIP file despite I set it not to

Expected behavior

With these settings, whenever I download it shouldnt pack anything at all

Example work from Pixiv
https://www.pixiv.net/en/artworks/121556147

Screenshots
Instead of downloading every images, this is what I downloaded

Browser and Version (please complete the following information):
Firefox 129.0.1 (64-bit)
PixivToolkit v4.9.0

Settings of extension
{"MangaPageNumberStartWithOne":false,"alwaysPack":false,"animationJsonFormat":0,"askDownloadSavedWork":true,"autoActivateDownloadPanel":true,"displayWorkTypeLabel":true,"downloadRelativeLocation":"pictures/pixiv/","downloadSaveAs":false,"downloadTasksWhenDownloadingImages":3,"enableExtTakeOverDownloads":true,"enableExtend":false,"enableExtension":true,"enablePackUgoiraFramesInfo":true,"enablePtkSearch":true,"enableSaveDownloadHistory":1,"enableSaveVisitHistory":true,"enableWhenUnderSeconds":1,"extendDuration":3,"featureKnown":false,"guideShowed":false,"illustrationImageRenameFormat":"pixiv_{author}{id}{pageNum}","illustrationKeepPageNumber":false,"illustrationPageNumberLength":0,"illustrationPageNumberStartWithOne":true,"illustrationRelativeLocation":"","illustrationRenameFormat":"pixiv_{author}{id}","importantNoticeDisplayed":false,"language":"default","mangaImageRenameFormat":"pixiv{author}{id}{pageNum}","mangaPageNumberLength":0,"mangaPageNumberStartWithOne":true,"mangaPagesInChunk":99,"mangaRelativeLocation":"","mangaRenameFormat":"pixiv_{author}{id}","maxDownloadRecords":10000,"maxHistoryItems":10000,"notSaveNSFWWorkInHistory":false,"novelIncludeDescription":false,"novelRelativeLocation":"","novelRenameFormat":"pixiv{author}{id}","statIllustDownloaded":7,"statMangaDownloaded":0,"statNovelDownloaded":0,"statUgoiraDownloaded":0,"ugoiraQuanlity":1,"ugoiraRelativeLocation":"","ugoiraRenameFormat":"pixiv{author}_{id}","version":"4.9.0","visitHistoryType":"list","workCoverSize":1}

Additional context