[Plugin: Thumbnail For Excerpts] My website crashed when i install this plugin

I don’t know why, but when i install this plugin my CPU works at 100% and i have very lot connection to MySQL.

My website doesnn’t work correct after installation this plugin.
I install this plugin on software.com.pl linux.com.pl and many sites.

On my website digitalconcept.pl i don’t see any feeds after i install this plugin, when i deactivate this plugin rss works correctly.

Maybe someone help me or maybe you know other simillary plugin to Thumbnail For Excerpts