Hi @matheus156, you can try this: add the --no-experiments switch at the end of the shortcut you use to run your Opera. It should looks like following: "\path\to\launcher.exe" --no-experiments
If the browser run and doesn't crash, click on the address bar and type opera:flags, press enter and click the "Reset all button" and then "Relaunch" button. Remove the switch from the shortcut, run the browser and see if this helps.
If the above doesn't help, launch the Opera with the following switch: "\path\to\launcher.exe" --disable-extensions
If it helps, go to "Extensions" page (default shortcut "Ctrl+Shift+E") and disable all extensions.
Close the browser and remove the switch, launch the Opera, start enabling extensions one by one and try to figure out which one may be the culprit.