BullCharts 5.1.15 for Windows 10 for an existing installation of BullCharts (you must have BullCharts already installed as the upgrade has no database.)
https://download.bullcharts.com.au/Download/BC510/BCUpgradeV5.1WithASXDB.zip
Unzip the file the run the programme to install
BullCharts 5 Reset for 4k Monitors if the Toolbar icons are too large
If after installation of BullCharts 5 the icons are too large try resetting.
https://kb.bullcharts.com.au/knowledge-base/bullcharts-version-5-0-icons-too-large/