Hi,
Just upgraded from 6.0.2 to 6.1.2 in 2 steps:
Step 1:
- used Jun's 1.02b bootloader on a new stick (different from the one previously used to boot 6.0.2)
- did a manual install of 6.1 (DSM_DS3615xs_15047) selecting to only keep the files and NOT the seetings. I was kinda forced to since I've previously f**ked my DSM during Virtual Machine Manager installation ... my fault for not being carefull enough)
Step 2:
- did a standard upgrade to latest version from Synology 6.1 Control Panel straight to 6.1.2
- after reboot everything was ok: files still there
I think it would have worked with keeping the settings as well (Step 1), but as I said, mine was broken anyway.
WARNING !!! If you try this, be careful so you won't lose important settings of files !!! So, backup/test are a must.
I hope this helps.
Regards,