Try to delete the following workspace folder:
macOS:
~/Library/Application Support/name.abuchen.portfolio.product/workspace
Windows:
%LOCALAPPDATA%\PortfolioPerformance\workspace
Linux:
~/.PortfolioPerformance/workspace
Try to delete the following workspace folder:
macOS:
~/Library/Application Support/name.abuchen.portfolio.product/workspace
Windows:
%LOCALAPPDATA%\PortfolioPerformance\workspace
Linux:
~/.PortfolioPerformance/workspace