I didn't package my own version of 0.9.5, that I recall. Verson 0.9.8 was the first stand-alone Linux installer package I released. If you have v0.9.5 you must have installed it from Xubuntu's standard software repos (unless you think you compiled it yourself). Should be easy to determine.
From a terminal, let me know what the result of the following command is:
dpkg -l sigil
(that's a lower-case 'L' in case it's unclear)
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