I'm having really bad font issue with Little Navmap. When it starts, fonts in the interface have odd spacing. If I select Tools-->Options-->Display and Text and click Select Font, the program crashes. Last portion of log:

[2021-08-13 10:01:35.469 DEBUG]: void AircraftPerfController::tabVisibilityChanged()
[2021-08-13 10:01:35.510 DEBUG]: void atools::gui::MainWindowState::toWindow(QMainWindow*, const QPoint*) const mainWindow->frameGeometry() QRect(0,0 1282x832)
[2021-08-13 10:01:35.510 DEBUG]: void atools::gui::MainWindowState::toWindow(QMainWindow*, const QPoint*) const Visible on "\\\\.\\DISPLAY1" QRect(0,0 1920x1050)
[2021-08-13 10:01:35.510 DEBUG]: void MainWindow::stayOnTop()
[2021-08-13 10:01:35.510 DEBUG]: void MainWindow::raiseFloatingWindows()
[2021-08-13 10:01:35.510 DEBUG]: static void atools::gui::DockWidgetHandler::raiseFloatingWindow(QDockWidget*)
[2021-08-13 10:01:35.510 DEBUG]: static void atools::gui::DockWidgetHandler::raiseFloatingWindow(QDockWidget*)
[2021-08-13 10:01:35.510 DEBUG]: static void atools::gui::DockWidgetHandler::raiseFloatingWindow(QDockWidget*)
[2021-08-13 10:01:35.510 DEBUG]: static void atools::gui::DockWidgetHandler::raiseFloatingWindow(QDockWidget*)
[2021-08-13 10:01:35.510 DEBUG]: static void atools::gui::DockWidgetHandler::raiseFloatingWindow(QDockWidget*)
[2021-08-13 10:01:35.510 DEBUG]: static void atools::gui::DockWidgetHandler::raiseFloatingWindow(QDockWidget*)
[2021-08-13 10:01:35.510 DEBUG]: static void atools::gui::DockWidgetHandler::raiseFloatingWindow(QDockWidget*)
[2021-08-13 10:01:35.510 DEBUG]: static void atools::gui::DockWidgetHandler::raiseFloatingWindow(QDockWidget*)
[2021-08-13 10:01:35.510 DEBUG]: static void NavApp::setMainWindowVisible()
[2021-08-13 10:01:35.615 DEBUG]: void atools::util::UpdateCheck::httpFinished()
[2021-08-13 10:01:35.615 WARN ]: Empty version
[2021-08-13 10:01:37.971 DEBUG]: virtual void OptionsDialog::open()
[2021-08-13 10:01:37.972 INFO ]: static QVector<QLocale> atools::gui::Translator::findTranslationFilesInternal(const QString&) "D:/Little Navmap/translations/littlenavmap_de.qm" name "de_DE" bcp47Name "de" country "Germany" native "Deutschland" language "German" native "Deutsch"
[2021-08-13 10:01:37.972 INFO ]: static QVector<QLocale> atools::gui::Translator::findTranslationFilesInternal(const QString&) "D:/Little Navmap/translations/littlenavmap_es.qm" name "es_ES" bcp47Name "es" country "Spain" native "España" language "Spanish" native "español de España"
[2021-08-13 10:01:37.972 INFO ]: static QVector<QLocale> atools::gui::Translator::findTranslationFilesInternal(const QString&) "D:/Little Navmap/translations/littlenavmap_fr.qm" name "fr_FR" bcp47Name "fr" country "France" native "France" language "French" native "français"
[2021-08-13 10:01:37.972 INFO ]: static QVector<QLocale> atools::gui::Translator::findTranslationFilesInternal(const QString&) "D:/Little Navmap/translations/littlenavmap_it.qm" name "it_IT" bcp47Name "it" country "Italy" native "Italia" language "Italian" native "italiano"
[2021-08-13 10:01:37.973 INFO ]: static QVector<QLocale> atools::gui::Translator::findTranslationFilesInternal(const QString&) "D:/Little Navmap/translations/littlenavmap_nl.qm" name "nl_NL" bcp47Name "nl" country "Netherlands" native "Nederland" language "Dutch" native "Nederlands"
[2021-08-13 10:01:37.973 INFO ]: static QVector<QLocale> atools::gui::Translator::findTranslationFilesInternal(const QString&) "D:/Little Navmap/translations/littlenavmap_pt_BR.qm" name "pt_BR" bcp47Name "pt" country "Brazil" native "Brasil" language "Portuguese" native "português"
[2021-08-13 10:01:37.973 INFO ]: static QVector<QLocale> atools::gui::Translator::findTranslationFilesInternal(const QString&) "D:/Little Navmap/translations/littlenavmap_zh.qm" name "zh_CN" bcp47Name "zh" country "China" native "中国" language "Chinese" native "简体中文"
[2021-08-13 10:01:37.973 DEBUG]: void OptionsDialog::languageChanged(int) "en_US"
[2021-08-13 10:01:37.973 DEBUG]: void OptionsDialog::udpdateLanguageComboBox(const QString&) currentIndexLangCountry 0 currentIndexLang 0
[2021-08-13 10:01:37.974 DEBUG]: void OptionsDialog::updateOnlineWidgetStatus()
[2021-08-13 10:02:24.758 DEBUG]: Clicked "Cancel"
[2021-08-13 10:02:24.758 DEBUG]: virtual void OptionsDialog::reject()
[2021-08-13 10:02:30.784 WARN ]: QPainter::begin: Paint device returned engine == 0, type: 3
[2021-08-13 10:02:30.784 WARN ]: QPainter::setCompositionMode: Painter not active
[2021-08-13 10:02:30.784 WARN ]: QPainter::end: Painter not active, aborted
[2021-08-13 10:02:30.790 WARN ]: QPainter::begin: Paint device returned engine == 0, type: 3
[2021-08-13 10:02:30.790 WARN ]: QPainter::setCompositionMode: Painter not active
[2021-08-13 10:02:30.790 WARN ]: QPainter::end: Painter not active, aborted
[2021-08-13 10:02:30.797 WARN ]: QPainter::begin: Paint device returned engine == 0, type: 3
[2021-08-13 10:02:30.797 WARN ]: QPainter::setCompositionMode: Painter not active
[2021-08-13 10:02:30.797 WARN ]: QPainter::end: Painter not active, aborted
[2021-08-13 10:02:38.625 DEBUG]: virtual void OptionsDialog::open()
[2021-08-13 10:02:38.625 DEBUG]: void OptionsDialog::udpdateLanguageComboBox(const QString&) currentIndexLangCountry 0 currentIndexLang 0
[2021-08-13 10:02:38.625 DEBUG]: void OptionsDialog::updateOnlineWidgetStatus()
 

Thanks in advance.

Somehow the painting went broke. Try the troubleshooting from the FAQ here: https://albar965.github.io/littlenavmap-faq.html#fix-issues

Maybe deleting the settings as described in the link above helps.

Alex