QtDesigner doesn't save updated paths to resource files when *.ui moved manually to another folder.

Having moved *.ui file one node upwards in a folder hierarchy, I encountered a problem of unresolved resource paths. QtDesigner suggested to update them. Well, I've pointed him at locations of resources. Then it has properly loaded. But after closing the form (doing no single changes in it) and reopening its *.ui again, the problem raised again. Spending some time, I tried to do a dummy modification of this form (i.e. edit some text of the label) and save it. The problem has gone. So I suggest you to set the status 'modified' to this form in case of such an update of resource paths, prior to any further actions of user.