Invalid Image File name APM Webtop resource

Hey all, anyone having issues uploading an image for things resource links added to an APM full webtop? On version 12.1 when uploading an image to replace the Globe image, it looks like it wants to use the full file path (i.e. c:/folder/blah/filename.jpeg) instead of what I am used to seeing which is just the file name. Getting an invalid file name error which I am assuming is because of the extra colons and slashes in the file path. Any help appreciated. Thanks.