In some cases, we may have to remove all files and folders associated with an application and then reinstall. It is important to find ALL associated files and folders as often the problem you are experiencing may be due to having multiple files and versions on your machine. Also, you may have contacted support to ask about uninstalling a program from your Mac. The quickest most efficient way on your Mac is to use the Spotlight Tool which you can access at the upper right corner of your desktop. Just type the search criteria into the text field, and a list will show. You can replace the name Exposure in this article with the name of the software you are trying to remove. For example if you are removing Blow Up 3, just search for Blow up 3 in the Spotlight menu.
Searching with quotes, such as "Exposure 5", will yield a more relevant search result, since the quotes means find the exact phrase.
You can then choose "Show All" to open a finder window with all files and folders containing that name.
You can then highlight the files and folders with that name, right click or control click, and select "Move to Trash". After you empty the trash, all the files will be deleted, and you can then reinstall. You can ignore files that just have the program name in its metadata. The main things you are looking for are the folders located in your Photoshop plugins directory, and the application file if it appears in the list.
The arrows in the image below, show you what you will want to delete. When you see a folder for the plug-in, just select the folder, and you will see it's path at the bottom. Make sure you are deleting the one in your plug-ins folder, wherever you have them installed at. My plug-in path listed below may be different than yours.
Once you have completed these steps you will need to delete the binary file on your Mac, if your software has one. This is the file that contains the actual executable code for the software. You can use Finder to browse to these locations.
Bokeh 2 - Macintosh HD > Applications > Alien Skin Bokeh 2.app
Exposure 5 - Macintosh HD > Applications > Alien Skin Exposure 5.app
Blow Up 3 - Macintosh HD > Library > Application Support > Alien Skin > Blow Up 3 > Alien Skin Blow Up 3.app
Snap Art 4 - Macintosh HD > Applications > Alien Skin Snap Art 3.app