Based upon Herculezz's post on June 13, 2016, ISXRI should be considered as no longer being actively developed or supported.
ISXRI should continue to work for the content it was designed; however, unless Herculezz returns in the future to resume development, it will not be updated for new content.
It is also important to remember that ISXRI is closed-source. Therefore, if InnerSpace were to update at some point (which would require an update to all extensions), ISXRI may stop functioning unless Herculezz returns to update it.
ISXRI should continue to work for the content it was designed; however, unless Herculezz returns in the future to resume development, it will not be updated for new content.
It is also important to remember that ISXRI is closed-source. Therefore, if InnerSpace were to update at some point (which would require an update to all extensions), ISXRI may stop functioning unless Herculezz returns to update it.