I can not export a theme to the directory that I have created. It says "Error uploading thumb_1". I made sure my image is proper size and everything.
When you export a theme, it gets saved as a file on your computer and not as an image. Theme files cannot be opened by your computer, only by the PB software. Theme files end with a file extension of .pbt - which is not an image extension (.jpg; .jpeg; .gif; .png). The only place you can "upload" a theme file is from your PB forum admin panel (Admin >Themes > Theme Manager) via the Import Theme button. It cannot be uploaded as an image anywhere as it is not an image file.