When using this tool, you may need to add `toram only-ubiquity` to the kernel parameters in GRUB editor if you only want to install the Linux and not try/test. The only problem is, you may need at least 4 GB of RAM to do this. I'm not sure of other ways for now.
If using the executable, you can also drag ISO file to it.
If Windows asks you if you want to format a partition while using this, DO NOT!!
IF YOU CONFIGURED TO CREATE AN ADDITIONAL PARTITION FOR YOUR FILES, MAKE SURE NOT TO OVERWRITE IT IN THE INSTALLER! Your best solution would be to use external media or cloud storage.