Associate .ica File Type With Citrix Connection Manager
On Windows computers, go to Control Panel > Settings > Apps > Default apps > Choose default apps by file type
Under Name, find .ica file type.
Ensure that the current default is set to Citrix Connection Manager. If not, click Change program and choose Citrix Connection Manager.
Note: Connection Manager is the wfcrun32 file located as C:\Program Files (x86)\Citrix\ICA Client\wfcrun32.exe