[sage-support] Can not do anything after 6.4 upgrade

[Jori Mantysalo]

I have a Sage installation started from 4.7 and upgraded from version to 
version up to 6.3 and then to 6.4.beta4. "Upgrading" means just putting 
new binaries to run with same user account.

Now I tried 6.4. Evaluate-button disappeared, shift+enter did nothing on 
old notebooks and I was not able to write to cells. Adding new worksheet 
worked (with title "untitled") and I could add new cells to both new and 
old worksheet.

Any ideas? Plain 6.4 as a new installation seems to work.

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Jori Mäntysalo