Trying to upgrade from 3.0.8 or 3.0.9RC1 to 3.0.9RC2 using

http://download.phpbb.com/pub/release/3.0/release_candidates/update/other_to_3.0.9-RC2/phpBB-3.0.8_to_3.0.9-RC2.zip
http://download.phpbb.com/pub/release/3.0/release_candidates/update/other_to_3.0.9-RC2/phpBB-3.0.9-RC1_to_3.0.9-RC2.zip

and I got this error

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Warning: require(./../includes/startup.php) [function.require]: failed to open stream: No such file or directory in C:\...\phpBB3\install\index.php on line 27

Fatal error: require() [function.require]: Failed opening required './../includes/startup.php' (include_path='.;C:\php\pear') in C:\...\phpBB309\install\index.php on line 27

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To make it to work I had to copy includes/startup.php file from full 3.0.9 RC2 package