Visit https://sourceforge.net/projects/jequity/files/JEquity/ and select the most recent folder (e.g., JEquity-<version>).
Inside this folder, click the file with the sh extension (e.g., JEquity_linux-unix_<version>.sh).
Once the file finishes downloading,
- Open your GUI file explorer.
- Locate the downloaded sh file.
- Right-click and select Properties.
- Select Permissions tab.
- Check Allow executing file as program.
- Close Properties dialog box.
- Right-click, select the Run option, and follow the instructions.