AxCrypt keeps some persistent data and chosen options in the registry. Most of these are managed automatically, and should not be modified manually.
Some values under HKEY_CURRENT_USER\Software\Axon Data\AxCrypt\ are:
ServerMode is a DWORD entry, that when non-zero causes AxCrypt to enter a non-interactive server mode. In this mode, no message boxes or dialogues will be displayed. The messages will be logged to %TEMP%\AxCrypt.Log, and they will be given default responses. The shell extension, i.e. the right click menu in Windows Explorer with AxCrypt options will be disabled as well.
EventLogLevel is normally zero DWORD, causing nothing to be logged, unless server mode is enabled. You may increase this to positive values to get increasing levels of detailed log-entries in %TEMP%\AxCrypt.Log. This is primarily for testing and debugging purposes.
EntropyPool is 128 byte BINARY used to persistently save the state of
half of the entropy pool.
KeyWrapIterations is a DWORD that specifies the number of rounds
performed in the key-wrapping operation, where the actual master data encrypting
key is wrapped with the SHA-1 hash of the pass phrase. The minimum value is 6,
no maximum, except it may take a long time...
NoUnsafeWipeWarn is a DWORD that when non-zero disables the warning about not being able to securely wipe certain types of files, notably compressed and EFS encrypted. This is modified by the checkbox in the warning dialog.
SaveDecKey is a DWORD that when non-zero causes decryption pass phrases to be cached in memory. This is modified by the checkbox in the enter pass phrase dialog.
SaveEncKey is a DWORD that when non-zero causes an encryption pass phrase to be cached in memory and be used as default encryption pass phrase. This is modified by the checkbox in the enter pass phrase dialog for encryption.
CompressThreshold is DWORD that indicates the minimum estimated compression level needed for AxCrypt to compress before encryption. To disable compression, set the value to 101. To enable compression in all cases, set it to 0. The default is 20, indicating that at least estimated 20% savings is required for compression to be performed.
DisableRenameMenu is a DWORD when non-zero causes the anonymous rename menu to disappear from the right-click context menu.
TryBrokenFile is a DWORD that when non-zero makes AxCrypt give the user the option to try decrypting a file, even if it appears broken. Use only for data-recovery, and at your own risk, and always on a copy of the file in question.
BruteForceCheck is a REG_SZ that maintains the most recent check-point in a custom brute force key-recovery search. See the code for details. This is not for ordinary mortals. Please don't waste bandwidth hollering 'back-door' without understanding what this is about. It's not. For questions, please contact me directly.
AllowAnyExtension is a DWORD that when non-zero causes AxCrypt to allow any extension of files to be decrypted. The default is to assume that if this happens it's because of a faulty association, and thus give a message to this effect.
Some values under HKEY_LOCAL_MACHINE\Software\Axon Data\AxCrypt\ are:
SelfExtractorName is a REG_SZ that contains the name of the executable
base file used for self decrypting archives. This should be a file name without
a path, it must reside in the same directory as the program.