License expired and need to update while saving old data

I’m wondering if it is possible to update while saving old data of my server,such as channels,icons and other settings.For I only have a free license,if it could do so,it would help me a lot.Unfortunately I just replaced the whole server filefolder and lost my all old datas.
By the way,I run my server on Linux.

A post was merged into an existing topic: Update / Upgrade a server

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