You can feel free to add suggestions to the Photopost Pro suggestions forum for the developer to consider. I am not the developer for Photopost Pro so begging me really can not do anything.
The only thing I can tell you is this and any further discussion you will need to discuss with others in the mod corner since we do not support code hacking. you could try altering your say sidebar left open template and on all the if clauses try adding something like this to the if clauses if you do not wish guests to view it
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