I've tried upgrading from 4.5 => 5.0 => 5.1, and every time I've selected the default/recommended "Remove conflicting versions" option.
After upgrade, the keyboard shortcuts for RS (VS->Tools->Options->Keyboard) is always reset so I must go in and re-assign them. Also I get the "ReSharper Shortcut Conflict" windows when using e.g. Alt+Enter (i.e. if I want to use Resharper command etc.) which I guess is due to the reset of keyboard shortcuts.
The user templates and pattern catalog in 5.0 remains however, so it seems only to be keyboard shortcuts that are reset.
Original message URL: http://www.jetbrains.net/devnet/message/5264476#5264476