Windows cannot open APP files?
When Windows cannot determine which application to use to open this file format type, the cause could be:
We strongly recommend that you run a Instant Scan for related errors.
Files with the APP extension are executable files used on MAC OS X. APP files contain data files that are used in property list files, plug-in files and other files necessary for the execution of the program. APP files may be viewed and modified with the appropriate software tools.APP files are widely used as application files but may also be used as layered files used in interface framework files, communication related files and multimedia files applied to mobile phone technology.
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"I manage a community newsletter, and my writers would always send me strange files I couldn't open. One got fed up and got me FileCure. Well – it worked. Nice program!"