Skrooge doesn't accept password

Hi,
I had to reinstall my Kubuntu. After that I’m not able to open my skrooge file, I’m been using for years. I treid on a different client but with no success.
When I try to open it asks for a password as usual. But it doesn’t accept the password. Because I’ve been typing it very often the past years I’m pretty sure it is right and assume another problem while opening the file. What me also makes a bit suspicious is that there only is a *.skg.old.old file. I looked in my backups. Some days before there was a *.skg.old but no *.skg
Is it possible that I worked in a backup (.old) the past time. If it is technically possible I might have done this.
Is there somebody to help me? I would loose data from al veeeerrrryyyyy long time.
Here is an except of the logging information if you need more information pleas ask.

 e[34m>static KMessageWidget* SKGMainPanel::displayErrorMessage(const SKGError&, QAction*, bool)e[39m
##      e[34m<static KMessageWidget* SKGMainPanel::displayErrorMessage(const SKGError&, QAction*, bool)e[39m
##    e[33m<void SKGFilePlugin::onNew()e[39me[33m RC=[SUC-0]: Das Dokument ist erfolgreich erstellt worden.e[39m
##    e[33m>static KMessageWidget* SKGMainPanel::displayErrorMessage(const SKGError&, QAction*, bool)e[39m
##    e[33m<static KMessageWidget* SKGMainPanel::displayErrorMessage(const SKGError&, QAction*, bool)e[39m
##  e[32m<void SKGFilePlugin::onOpen(const QUrl&)e[39me[31m RC=[ERR-5]: Die Datei „/home/holger/Haushaltsbuch_migrated.skg“ kann nicht geöffnet werden.e[39m
##  e[32m>virtual QStringList SKGImportExportPlugin::processArguments(const QStringList&)e[39m
##  e[32m<virtual QStringList SKGImportExportPlugin::processArguments(const QStringList&)e[39m
##  e[32m>int main(int, char**)e[39m
##    e[33m>virtual void SKGTreeView::resizeColumnsToContentsDelayed()e[39m
##    e[33m<virtual void SKGTreeView::resizeColumnsToContentsDelayed()e[39m
##    e[33m>void SKGMainPanel::refresh()e[39m
##      e[34m>virtual void SKGFilePlugin::refresh()e[39m
##        e[35m>virtual int SKGDocument::getTransactionToProcess(SKGDocument::UndoRedoMode, QString*, bool*, QDateTime*, bool*) conste[39m
##        e[35m<virtual int SKGDocument::getTransactionToProcess(SKGDocument::UndoRedoMode, QString*, bool*, QDateTime*, bool*) conste[39m
##      e[34m<virtual void SKGFilePlugin::refresh()e[39m
##      e[34m>virtual void SKGBookmarkPlugin::refresh()e[39m
##        e[35m>virtual void SKGBookmarkPluginDockWidget::refresh()e[39m
##          e[36m>void SKGBookmarkPluginDockWidget::onBookmarkEditorChanged()e[39m
##          e[36m<void SKGBookmarkPluginDockWidget::onBookmarkEditorChanged()e[39m
##        e[35m<virtual void SKGBookmarkPluginDockWidget::refresh()e[39m
##        e[35m>void SKGBookmarkPlugin::importStandardBookmarks()e[39m
##          e[36m>virtual SKGError SKGDocument::beginTransaction(const QString&, int, const QDateTime&, bool)e[39m
##          Input parameter [name]=[Standard-Lesezeichen importieren]  [nb step]=[1]  [refresh]=[Y]
##          Input parameter [iSqlOrder]=[BEGIN;]
##            e[37m>virtual int SKGDocument::getTransactionToProcess(SKGDocument::UndoRedoMode, QString*, bool*, QDateTime*, bool*) conste[39m
##            e[37m<virtual int SKGDocument::getTransactionToProcess(SKGDocument::UndoRedoMode, QString*, bool*, QDateTime*, bool*) conste[39m
##          Input parameter [iSqlOrder]=[insert into doctransaction (d_date, t_name, i_parent) values ('2024-03-23 16:10:49','Standard-Lesezeichen importieren', 0);]

The issue is the same withe the recent version from apt and snap.

Thank you
Holger