Kate project plugin in 17.04.01 windows version can not be enabled. The plugin is disabled (the checkbox in configuration is unchecked) automatically. I remember that it's OK on the previous version. I tested both of 32 bit version and 64 bit version on Windows 7 English version, and tested 32 bit version on Windows 8.1 Simplified Chinese version. Kate snippet plugin is also can not be enabled.
Thanks for the report! This 17.04.01 windows installer seems to have a lot of issues :(
Please try out the new nighly installers linked on https://kate-editor.org/get-it