Hello Serban

Unfortunately, I am not sure I understand what you mean by "what size I should have for these pictures". There is no precise requirement for how big an image needs to be, it depends on what you plan on using it for

About the second issue, I can confirm that it is known and has currently already been fixed. A new update featuring the solution should be released in the upcoming days so I need to ask you to be patient just a little longer until it is officially released

Thank you

Stefano