Some posts on GitHub and MT motivated me to find a way to apply changes in SRP settings in H_C without logging off the account or refreshing Explorer. After some testing, it turned out that adding/removing the protected file extension from <Designated File Types> did the job.
I am testing this for several days and it works without any issue from Windows Vista to Windows 10.
The only exception is when one changes <Enforcement> settings, which still require logging off or refreshing Explorer. But, the H_C Recommended Settings and all H_C profiles (except "ALL OFF") use in fact "Skip DLLs" setting - so, there is no problem.
So, in the next beta version after pressing <APPLY CHANGES> button, the splash window will be usually displayed (for 1.5 s), to inform the user that SRP rules were refreshed.
I also added the Explzh archiver support to H_C.