Language changes automatically from Hungarian to Icelandic (at probably each windows restart). Icelandic is the following language after Hungarian in the sub-menu list.
I cannot reproduce the problem, so I'll explain how it works instead. Whenever you close the program it saves identifier of the selected language to the gui.ini file inside of the installation directory, like so:
[Language]Selected=101
(101 identifies Hungarian language in UltraDefrag 7.0). Later on, when you start UltraDefrag next time, it reads the identifier from the file and sets language accordingly. If something goes another way in your case let me know.
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I cannot reproduce the problem, so I'll explain how it works instead. Whenever you close the program it saves identifier of the selected language to the gui.ini file inside of the installation directory, like so:
(101 identifies Hungarian language in UltraDefrag 7.0). Later on, when you start UltraDefrag next time, it reads the identifier from the file and sets language accordingly. If something goes another way in your case let me know.