Hi, If you want to rebuild what you had, you should manually install dsm and do not upgrade past 6.2.3-25426 update 3, as it will break your loader.  However, I use arpl-i18n which still has options to build loaders with 6.2.4-25556 update 7 for some platforms (DS918/1019, DS1621 etc) but for some reason related to modules they are not working on bare-metal (from my personal experience), only on Proxmox as VM. Good luck arpl-i18n releases
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