Is there a way to prevent pl/sql developer to raise/display dialogs for (&/&&) substitution variables.
I want those dialogs only when I execute the code from the SQL editor.

Maybe I am overextending the use of templates and I should use just files...but currently I use templates as a tools repository.

If you specify && in a template, it will not be interpreted as a substitution variable, and && will be inserted as &.

Consider the following template text:

select * from &&table

When using this template you will not be prompted for a substitution variable, and the following text will be inserted:

select * from &table