I just noticed that Options->Appearance->General->Hide mouse pointer doesn't seem to work under Beta 4. I don't know if it worked in previous betas, but it did work in Slickedit 17.
SlickEdit 2013 (v18.0.0.8 64-bit)
Serial number: FE14399_BETA
License type: Beta License
License expiration: 2013-07-23 08:06:00
License file: C:\ProgramData\slickedit\18\slickedit.lic
Build Date: May 16, 2013
Emulation: Epsilon
OS: Windows 7 x64
OS Version: 6.01.7601 Service Pack 1
Memory: 28% Load, 4622MB/16309MB Physical, 5314MB/32617MB Page File, 391MB/8388607MB Virtual
Shell Info: C:\Windows\system32\cmd.exe /q
Screen Size: 1920 x 1200, 1200 x 1600
Project Type: Microsoft Visual Studio Visual C++
Language: .h (C/C++)
Installation Directory: C:\Program Files\SlickEditV18.0.0 x64 Beta4\ (non-removable drive,NTFS,102640MB free)
Configuration Directory: C:\Users\evan\Documents\My SlickEdit Config\18.0.0\ (non-removable drive,NTFS,102640MB free)
Spill File: C:\Users\evan\AppData\Local\Temp\$slk.3 (non-removable drive,NTFS,102640MB free)