Conversion button went to religion map

[Grosshaus]

I was playing Poland and while doing some heavy conversion had a lot of revolts also. Somewhere in between I lost the conversion button altogether. I found it had wandered off to the religion map instead of the missionary map. The option remains greyed out so I can't convert anymore.

I use plain 1.07 and EEP 1.41

 

[AndrewT]

Sounds like some file got corrupt. Prime candidate would be the EEP, but my first advice would be a reinstall.