Problem 1. 
Please ensure that you don't install PSPad as portable. No application has
rights to write into Program files folder.
You have 2 ways how to fix it:
1. Run PSPad installer again and uncheck option "Portable application" during
setup.
2.  Run  PSPad  as  administrator  (use  right mouse) to elevate PSpad rights,  
go   to  Program  settings  /  System  and  check  multiuser environment

Your previous setting will be preserverd.


Problem 2. 
send me screenshot please. I am sure there is no recycle bin icon, but blank
page icon. 
Go to program settings / Program 1 and check use system icon in file explorer.
Point 2) wont be necessary, cause point 1 will fix your problems include point
2.

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Odpovedet emailem