If you using 0.2.1-beta or before you must unistall and "Delete the extension’s data" before upload 0.2.7-beta files.
This extension is in the beta stage, keep in mind that it is only for test propose, not use beta stage extension in live forum.
- Fixed issue with Font tag (reported here viewtopic.php?f=456&t=2427126&start=225#p14811921)
sorry for inconvenience and thank you for bug report.
Please upgrade to 0.2.7-beta which contains the correction. Thank you.