[sagitta]

I tried to install a dictionary to add a new language for spellcheck. It didn´t work because it appears lots of caracteres not letters. Also I couldn´t add the language in the top drop menu. After that, I can´t open the preferences window anymore, the program stop responses. I uninstalled sigil, cleaned the cache, register and install it again but it doesn´t help. The new instalation keeps remaining the same issue.
What can I do to have my preferences window back?
Thanks