download the Textpad installer zip file from textpad download site
unzip the zip file
run setup.exe
do not click next when prompted
open windows explorer
navigate to C:\Users\{your username}\AppData\Local\Temp\{A74D5544-B781-477E-814C-0B7F4D73BE76}
NOTE: the directory name maybe be different for each version so review subfolders in C:\Users\{your username}\AppData\Local\Temp\ by date modified