empty instances

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are you want to try a whole new pack (modloader version plus mod) or just changing out the mods used?

if the latter, you can rename the mods, config, and world folder to something like mods.1, config.1, and world.1, then create a new mods folder, and put the new mods in it.

restart and you've done some of what I think you were getting at

!instances

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https://www.bisecthosting.com/clients/index.php?rp=/knowledgebase/1114

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https://www.bisecthosting.com/clients/index.php?rp=/knowledgebase/1114/How-to-use-the-Instance-Manager-on-the-BisectHosting-Starbase-panel.html

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(basically you create a new instance by selecting the new modpack and when it asks 'what do you want to do with the current files' you select making a new instance)