If you want to change the default save path, go to File> Change Dir ...

Here we change the default save path by selecting the directory in the Directory tree (Directory Tree).

You can also enter the path in the Directory Name field

You can use the history list to re-enter text that you've already entered, click the arrow icon to the right

Click the Chdir button to refresh the directory tree

Press the Revert button to bring back the path you changed last.

After changing click OK to save.

Note: To save as the default setting in subsequent runs, go to Options> Save ....