Workaround 1:
Press and hold the Shift key, then right-click the stuck text editor icon in the taskbar then click Maximize
Workaround 2:
You can change the text editor to your own desired text editor as a workaround.
To do this:
1. Open ispLever Classic then click Options > Environment
2. Under General Tab, click the "Use your favorite Text Editor" tick box.
3. After checking the box, browse the executable file (*.exe) of the text editor that you want to use (ex. Notepad++.exe)