Unable to select more than one file unless you use the shift-click. The ctrl-click does not allow you to select more than one file.
Just tried again and found it sometimes selects a file if I click enough
SlickEdit Pro 2022 (v27.0.0.1 64-bit Qt4)
Serial number: FE17393_BETA
License type: Beta License
License expiration: 2022-10-19 20:00:00
License file: /opt/slickedit-pro2022beta1/bin/slickedit.lic
Build Date: August 1, 2022
Emulation: CUA
OS: Linux
OS Version: Ubuntu 18.04.6 LTS
Kernel Level: 5.4.0-122-generic
Build Version: #138~18.04.1-Ubuntu SMP Fri Jun 24 14:14:03 UTC 2022
Processor Architecture: x86_64
X Server Vendor: The X.Org Foundation
Window Manager: GNOME Shell
Display manager: /usr/sbin/gdm3
Memory: 97% Load, 47871MB/48854MB Virtual
Shell Information: "/opt/slickedit-pro2022beta1/bin/secsh" -i
Screen Size: 2560 x 1440, 2560 x 1440, 2048 x 1152
Project Type: Single file project - Gnuc
Language: .cpp (C/C++)
Encoding: UTF-8, no signature
Installation Directory: /opt/slickedit-pro2022beta1/
Configuration Directory: /home/tmoore/.slickedit/27.0.0/
Migrated from: /home/tmoore/.slickedit/26.0.3/
Spill File: /tmp/$slk.tmoore.5048