Some Questions about your 2 problems...
What type of LDAP Server is it? Do you have the ability to monitor the load on your LDAP Server? What is the network configuration of the LDAP Server in relation to the GoAnywhere Services Server? If you restart GoAnywhere Services, does this occur right away or does it occur after some time being active? Can you send us the exception from the log file? Also, can we get the configuration values of your LDAP Login Method?
Different LDAP Servers have different settings as far as Max Connections, Max Active Queries, Max Connection idle time, etc...
If we can get this information, we can further research your first problem and help you find a solution for this.
How many files/folders exist in the "My Documents" folder? If this folder has many files and folders then it will take longer to load within the applet.