Can we please have a copy of the previous DB file from the same folder; for Jarvis this will be Addons20.db. Share the file via dropbox or similar or if not possible email to my forum username @libreelec.tv. The file will be passed to Kodi developers to investigate why the migration process is failing. Fixes were added into Krypton 17.1 to solve a previous (more common) migration issue but there are clearly other scenarios that cause issues.
If I could manage to achieve this I would. I would like nothing better than having the Raspberry pi available to me again but as mentioned earlier I couldn't get putty to recognize my IP address so I wasn't able to undertake the previous request