Check your drives for any TRS22 folders, and check you have enough space on your C drive. TRS downloads in two parts: the actual programme, which you can select where it goes and the data folder, which only installs on your C drive. It can be moved once installed.
Your session folder should have something like the following (taken from my session folder)
profile = DAT File
profile.lyr = LYR File
profile.not = NOT File
profile_0_0.obs = OBS File...
Your session is missing profile_1_0.obs from the list shown in the open for edit in explorer folder.
Try to find it from an earlier saved session and copy it over. <kuid:228113:100115> is the kuid of your session. You say you have other similar ones; your session may be missing all the profile...