Level editor selection and camera movement controls have been changed suddenly

Hi!

First:

Earlier when I have opened level editor and used mouse left button, I could have select multiple objects with rectangle selection.

Then the camera have not been moved anywhere with mouse left button.

If I have wanted to move camera, I could’ve done it by clicking mouse right button and move camera with QWEASD-keys.

Now:

Suddenly mouse left button have started to move camera forward and backward and right button up and down.

I can now only select multiple objects by pressing ctrl + alt keys at same time when I select objects with mouse left button.

I want it back so it would work like in the “First” place.

Thank you for the replies!