As use one window for open files ?

[Xn User]

Hi )
I use XnConvert and ACDSee Pro , but after convert all JPEG2000 files to WEBP files , I understand what need use XnView MP , but I can not find where I can switch mode for if I open file 0001.webp in one folder , and next open file 0002.webp in other folder , XnView MP open secondary file in first window , without run next copy program , what I do not so ?

[user0]

Allow only one application instance (Settings > General)

[Xn User]

Thank you )