CobianSoft

When running the install as an update to a previous beta, I enter the User ID and password for installing the service under a Local account.
The service doesn't install/start reporting the error "Couldn't install the main service The account name is invalid or does not exist, or the password is invalid for the account name specified."
Once the update has completed, I go into the Service settings, enter the same User ID and password and the service installs and starts.
Is this expected behaviour?

No, but it happens sometimes when for example the user name is enteres with a space at the end or something similar.

Definitely no space at beginning or end of either User ID or password.
The password does contain a non Alpha character (*)
This happens on every update and is repeatable.

Will take a look at that.

This is still happening on every update I do.
Not a big problem....but somewhat annoying.
Currently on the latest release version.

Will look at that again.

Fixed for the next release.

In installations without a domain, I have to install it by typing .\username

It should detect that if we didn't type the domain or hostname of the machine, type ".\" before the user, or "{Hostname}\User"

And as an aside, when you write the FTP destination folder starting with slash, for example "/folder" gives an error, you always have to start without the slash.

It does now. It appends a .

If you start with a / it will consider the path an ABSOLUTE path. Without a / it is considered to be relative to your home directory.