Sigil creates a file user_prefs.json in path C:\Users\<USER>\AppData\Roaming\sigil-ebook\sigil\QtWebEngine\Preview\ on every run.
New: StressMyPC (Dec 10, 2025), Platform 30.1.3 (Nov 17, 2025)
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December 2025 Site Slowdown Being Addressed
I can confirm this is an issue. If you open up the SigilPortable.ini file within SigilPortable\App\AppInfo\Launcher, adjust the DirectoriesMove entry as follows:
This should handle portablizing the additional settings.
Sometimes, the impossible can become possible, if you're awesome!
This is fixed in Sigil Portable 2.0.2 Rev 2.
Sometimes, the impossible can become possible, if you're awesome!