When using RMIR v2.14.3, with remote URC-7955 (604803), if I try setting up a controlled DSM bound to a shifted key, and then save the file, then RMIR can no loader read the file: "Error loading file". If I set the DSM to a non-shift key, or delete the DSM, then the problem disappears.
I have attached a minimal test case. The attached file was a download of the remote after a factory reset, and a single DSM set up with a shifted key (no upgrades). The file cannot be loaded by RMIR.
Also: if I upload such configuration to the remote, then I can no longer download the remote.