If you used AmigaForever 2005 as a source of system files to install AmiKit, then AmiKit refuses to start as soon as you upgrade your AmigaForever installation to version "2006". Following error message appears:
"System ROM checksum incorrect. The system ROM image file may be corrupt."
To fix this problem quickly you do NOT need to reinstall AmiKit. Just copy following files from your new AmigaFoerver2006 installation to AmiKit\ROMs drawer:
Rename "amiga-os-310.rom" to "kick.rom" so the old file in AmiKit\ROMs will be overwritten.
EDIT: This issue has been resolved in AmiKit 1.2.0 (Full&Update) release.